Eeg to speech dataset pdf. Copy link Link copied.
Eeg to speech dataset pdf EEG was recorded using Emotiv EPOC+ [10] learning of complex features and the classification of imagined speech from EEG signals. Apr 9, 2020 · This study used the SingleWordProduction-Dutch-iBIDS dataset, in which speech and intracranial stereotactic electroencephalography signals of the brain were recorded simultaneously during a single word production task and showed that the DNN based approaches with neural vocoder outperform the baseline linear regression model using Griffin-Lim. Therefore, speech synthe-sis from imagined speech with non-invasive measures has (EEG) datasets has constrained further research in this eld. Linear models are presently used to relate the EEG recording to the corresponding speech signal. This innovative approach addresses the limitations of prior methods by requiring subjects to select and imagine words from a predefined list naturally. Content uploaded by Adamu Halilu Jabire. By providing a structured overview of EEG-based generative AI, this survey aims to equip researchers and practitioners with insights to advance neural decoding, enhance assistive technologies, and expand the frontiers of brain The interest in imagined speech dates back to the days of Hans Berger who invented electroencephalogram (EEG) as a tool for synthetic telepathy [1]. In this work we aim to provide a novel EEG dataset, acquired in three different speech related conditions, accounting for 5640 total trials and more than 9 hours of continuous recording. One of the major reasons being the very low signal-to Jun 23, 2022 · The first dataset contains EEG, audio, and facial features of 12 subjects when they imagined and vocalized seven phonemes and four words in English. To obtain classifiable EEG data with fewer sensors, we placed the EEG sensors on carefully selected spots on the scalp. The accuracies obtained are comparable to or better than the state-of-the-art methods, especially in Jul 22, 2022 · Measurement(s) Brain activity Technology Type(s) Stereotactic electroencephalography Sample Characteristic - Organism Homo sapiens Sample Characteristic - Environment Epilepsy monitoring center with EEG signal framing to improve the performance in capturing brain dynamics. pdf. ( 1 hour and 46 minutes o f speech on average for both datasets). Mar 18, 2020 · The proposed method is tested on the publicly available ASU dataset of imagined speech EEG. May 1, 2020 · The experiments show that the modeling accuracy can be significantly improved (match-mismatch classification accuracy) to 93% on a publicly available speech-EEG data set, while previous efforts tracking of EEG is to reconstruct speech envelopes from EEG and calculate the similarity between the reconstructed envelope and the original envelope as the evaluation metric, which is also the focus of the ICASSP Auditory EEG 2023 Challenge [8] that calls for building the best model to relate speech to EEG. Clayton, "Towards phone classification from imagined speech using a lightweight EEG brain-computer interface," M. EEG measurements and dataset preparation The EEG during Japanese speech listening was measured and processed to create a dataset of the EEG during speech Mar 6, 2024 · matic Speech Recognition (ASR) methods using audio. Tracking can be measured with 3 groups of models: backward models network pretrained on a large-scale speech dataset is adapted to the EEG domain to extract temporal embeddings from EEG signals within each time frame. Jan 10, 2022 · Download PDF. uated against a heldout dataset comprising EEG from 70 subjects included in the training dataset, and 15 new unseen subjects. We used two pre-processed versions of the dataset that contained the two speech features of interest together with the corresponding EEG signals. Although Arabic Feb 17, 2025 · We highlight key datasets, use cases, challenges, and EEG feature encoding methods that underpin generative approaches. Decoding speech from non-invasive brain signals, such as electroencephalography (EEG), has the potential to advance brain Dataset MAD-EEG1: 20-channel surface electroencephalographic (EEG) signals recorded from 8 subjects while they were attending to a particular instrument in polyphonic music. We achieve classification accuracy of 85:93%, 87:27% and 87:51% for the three tasks respectively. We have analyzed only the imagined EEG data for four words (pot, pat, gnaw, knew) to justify the comparison with the proposed work. The proposed approach utilizes three distinct machine learning algorithms—SVM, Decision Tree, and LDA—each applied separately rather than combined, to assess their effectiveness in decoding imagined speech. Jan 16, 2025 · Electroencephalogram (EEG) signals have emerged as a promising modality for biometric identification. Sc. EEG was recorded using Emotiv EPOC+ [10] an objective and automatic measure of speech intelligibility with more ecologically valid stimuli. Linear models are commonly used to this end, but they have recently been outperformed Feb 24, 2024 · Therefore, a total of 39857 recordings of EEG signals have been collected in this study. Although it is almost a century since the first EEG recording, the success in decoding imagined speech from EEG signals is rather limited. To decrease the dimensions and complexity of the EEG dataset and to Electroencephalography (EEG) holds promise for brain-computer interface (BCI) devices as a non-invasive measure of neural activity. The code details the models' architecture and the steps taken in preparing the data for training and evaluating the models ABSTRACTElectroencephalography (EEG) holds promise for brain-computer interface (BCI) devices as a non-invasive measure of neural activity. Multichannel Temporal Embedding for Raw EEG Signals The proposed Speech2EEG model utilizes a transformerlike network pretrained on a large-scale speech dataset to generate temporal embeddings over a small time frame for the EEG sequence from each channel. Recently, an objective measure of speech intelligibility has been proposed using EEG or MEG data, based on a measure of cortical tracking of the speech envelope [1], [2], [3]. Next to this dataset, we reuse a dataset from Vanthornhout et al. With increased attention to EEG-based BCI systems, publicly Jan 8, 2025 · Decoding speech from non-invasive brain signals, such as electroencephalography (EEG), has the potential to advance brain-computer interfaces (BCIs), with applications in silent communication and assistive technologies for individuals with speech impairments. 15 Spanish Visual + Auditory up, down, right, left, forward May 5, 2023 · In this paper, we propose an imagined speech-based brain wave pattern recognition using deep learning. We present the Chinese Imagined Speech Corpus (Chisco), including over 20,000 Nov 16, 2022 · Two validated datasets are presented for classification at the phoneme and word level and by the articulatory properties of phonemes in EEG signal associated with specific articulatory processes. During inference, only the EEG encoder and the speech decoder are utilized, along with the connector. In this paper, we 2. Neural network models relating and/or classifying EEG to speech. 7% and 25. The interest in imagined speech dates back to the days of Hans Berger, who invented electroencephalogram (EEG) as a tool for synthetic telepathy [2]. DATASET We use a publicly available envisioned speech dataset containing recordings from 23 participants aged between 15-40 years [9]. signals tasks using transfer learning and to transfer the model learning of the source task of an imagined speech EEG dataset to the model training on iments, we further incorporated an image EEG dataset [Gif-ford et al. : Speech2EEG: LEVERAGING PRETRAINED SPEECH MODEL FOR EEG SIGNAL RECOGNITION B. Limitations and final remarks. Neural tracking has been found for multiple acoustic representations of speech, such as the spectrogram2,4 or envelope representations1,3,5,6. EEG-based imagined speech datasets featuring words with semantic meanings. 7% top-10 accuracy for the two EEG datasets currently analysed Nov 21, 2024 · The Chinese Imagined Speech Corpus (Chisco), including over 20,000 sentences of high-density EEG recordings of imagined speech from healthy adults, is presented, representing the largest dataset per individual currently available for decoding neural language to date. Table 1. The main purpose of this work is to provide the scientific community with an open-access multiclass electroencephalography database of inner speech commands that could be used for better understanding of Sep 4, 2024 · Numerous individuals encounter challenges in verbal communication due to various factors, including physical disabilities, neurological disorders, and strokes. Recent advances in deep learning (DL) have led to significant improvements in this domain. In this paper, research focused on speech activity detection using brain EEG signals is presented. The first dataset consisted of speech envelopes and EEG recordings sampled Jan 1, 2022 · PDF | On Jan 1, 2022, Nilam Fitriah and others published EEG-Based Silent Speech Interface and its Challenges: A Survey | Find, read and cite all the research you need on ResearchGate Acta Electrotechnica et Informatica, 2021. In addition to speech stimulation of brain activity, an innovative approach based on the simultaneous stimulation of the brain by visual stimuli such as reading and color naming has been used. The proposed speech- imagined based brain wave pattern recognition approach achieved a 92. 1. Download PDF. a new EEG dataset with 10 subjects, wherein subjects are asked to either actively listen to a speech stimulus or to ignore it while silently reading a text or solving arithmetic exercises. Meanwhile, other studies have used images derived from EEG data as inputs for The absence of publicly released datasets hinders reproducibility and collaborative research efforts in brain-to-speech synthesis. 2. The Biosemi 128-channel EEG recordings commonly referred to as “imagined speech” [1]. Wellington, "An investigation into the possibilities and limitations of decoding heard, imagined and spoken phonemes using a low-density, mobile EEG headset," M. 15 Spanish Visual + Auditory up, down, right, left, forward Apr 20, 2021 · Unfortunately, the lack of publicly available electroencephalography datasets, restricts the development of new techniques for inner speech recognition. Endeavors toward reconstructing speech from brain activity have shown their potential using invasive measures of spoken speech data, however, have faced challenges in reconstructing imagined speech. The proposed imagined speech-based brain wave pattern recognition approach achieved a 92 Oct 1, 2021 · Download full-text PDF Read full-text. Article; Open access; Decoding performance for EEG datasets is substantially lower: our model reaches 17. An area often underestimated in previous studies is the potential of EEG utilization during overt speech. Multiple features were extracted concurrently from eight-channel electroencephalography (EEG) signals. Evaluation of Hyperparameter Optimization in Machine and Deep Learning Methods for Decoding Imagined Speech EEG. We make use of a recurrent neural network (RNN) regression model Jan 16, 2023 · Download full-text PDF Read full-text. While extensive research has been done in EEG signals of English letters and words, a major limitation remains: the lack of publicly available EEG datasets for many non-English languages, such as Arabic. Author content. We present the Chinese Imagined Speech Corpus (Chisco), including over 20,000 sentences of high-density EEG recordings of imagined speech Feb 3, 2023 · Objective. Such models Jan 1, 2022 · Speech imagery (SI) is a Brain-Computer Interface (BCI) paradigm based on EEG signals analysis where the user imagines speaking out a vowel, phoneme, syllable, or word without producing any sound Jun 16, 2022 · The same DNN architectures generalised to a distinct dataset, which contained EEG recorded under a variety of listening conditions. A ten-subjects dataset acquired under this and two others related paradigms, obtained with an acquisition system of 136 channels, is presented. Motor-ImageryLeft/Right Hand MI: Includes 52 subjects (38 validated subjects w Feb 14, 2022 · Measurement(s) brain activity • inner speech command Technology Type(s) electroencephalography Sample Characteristic - Organism Homo sapiens Machine-accessible metadata file describing the Nov 16, 2022 · With increased attention to EEG-based BCI systems, publicly available datasets that can represent the complex tasks required for naturalistic speech decoding are necessary to establish a common J. Angrick et al. 3, Qwen2. Sc Nov 21, 2024 · The absence of imagined speech electroencephalography (EEG) datasets has constrained further research in this field. 1 2. Tasks relating EEG to speech To relate EEG to speech, we identified two main tasks, either involving a single speech source or multiple simultaneous speech sources. Recently, an increasing number of neural network approaches have been proposed to recognize EEG signals. (8) released a 15-minute sEEG-speech dataset from one single Dutch-speaking epilepsy patient, transition signals are cascaded by the corresponding EEG and speech signals in a certain proportion, which can build bridges for EEG and speech signals without corresponding features, and realize one-to-one cross-domain EEG-to-speech translation. Speech imagery (SI)-based brain–computer interface (BCI) using electroencephalogram (EEG) signal is a promising area of research for individuals with severe speech production disorders. PDF Abstract The following describes the dataset and model for the speech synthesis experiments from EEG using the Voice Transformer Network. Surface electroencephalography is a standard and noninvasive way to measure electrical brain activity. Identifying meaningful brain activities is critical in brain-computer interface (BCI) applications. The proposed imagined speech-based brain wave pattern recognition approach achieved a 92. Sep 28, 2022 · Recent research has focused on detecting neural tracking of speech features in EEG to understand how speech is procesed by the brain1–3. When a person listens to continuous speech, a corresponding response is elicited in the brain and can be recorded using electroencephalography (EEG). S. Read full-text. However, these approaches depend heavily on using complex network structures to improve the performance of EEG recognition and suffer from the deficit of training data. Electronic decoding reaches a certain level of achievement yet current EEG-to-text decoding methods fail to reach open vocabularies and depth of meaning and individual brain-specific variables. Apr 28, 2021 · To help budding researchers to kick-start their research in decoding imagined speech from EEG, the details of the three most popular publicly available datasets having EEG acquired during imagined speech are listed in Table 6. EEG . The Nencki-Symfonia EEG/ERP dataset: high-density electroencephalography (EEG) dataset obtained at the Nencki Institute of Experimental Biology from a sample of 42 healthy young adults with three cognitive tasks: (1) an extended Multi-Source Interference Task (MSIT+) with control, Simon, Flanker, and multi-source interference trials; (2) a 3 May 1, 2020 · Source: GitHub User meagmohit A list of all public EEG-datasets. However, EEG-based speech decoding faces major challenges, such as noisy data, limited datasets, and poor performance on complex tasks Jun 7, 2021 · Electroencephalogram (EEG) Based Imagined Speech . Similarly, publicly available sEEG-speech datasets remain scarce, as summarized in Table 1. Inspired by the the distribution of the EEG embedding into the speech embed-ding. The FEIS dataset The FEIS (Fourteen-channel EEG for Imagined Speech) dataset [10], comprises EEG recordings of 21 English-speaking partic-ipants recorded with a This study employs variational autoencoders (VAEs) for EEG data augmentation to improve data quality and applies a state-of-the-art (SOTA) sequence-to-sequence deep learning architecture, originally successful in electromyography tasks, to EEG-based speech decoding. Materials and Methods . This dataset contains EEG collected from 19 participants listening to 20 continu-ous pieces of a narrative audiobook with each piece lasting about 3 minutes. dissertation, University of Edinburgh, Edinburgh, UK, 2019. The EEG and speech signals are handled by their re- Feb 14, 2022 · Unfortunately, the lack of publicly available electroencephalography datasets, restricts the development of new techniques for inner speech recognition. We considered research methodologies and equipment in order to optimize the system design, The interest in imagined speech dates back to the days of Hans Berger who invented electroencephalogram (EEG) as a tool for synthetic telepathy [1]. We then investigate Furthermore, several other datasets containing imagined speech of words with semantic meanings are available, as summarized in Table1. May 6, 2023 · Download file PDF Read Filtration has been implemented for each individual command in the EEG datasets. We introduce a May 7, 2020 · In this paper we demonstrate speech synthesis using different electroencephalography (EEG) feature sets recently introduced in [1]. These scripts are the product of my work during my Master thesis/internship at KU Leuven ESAT PSI Speech group. The ability of linear models to find … Feb 1, 2025 · By integrating EEG encoders, connectors, and speech decoders, a full end-to-end speech conversion system based on EEG signals can be realized [14], allowing for seamless translation of neural activity into spoken words. Integrating overt EEG signals with speech data by leveraging advancements in deep learning presents significant potential to enhance the efficacy of these systems. Aug 3, 2023 · Speaker-independent brain enhanced speech denoising (Hosseini et al 2021): The brain enhanced speech denoiser (BESD) is a speech denoiser; it is provided with the EEG and the multi-talker speech signals and reconstructs the attended speaker speech signal. A notable research May 13, 2023 · Download file PDF Read Filtration has been implemented for each individual command in the EEG datasets. II. Features well-synchronized musical stimuli and EEG responses; additional physiological signals: EOG, EMG, ECG; self-assessment of attention, stress and fatigue. Feb 11, 2025 · Brain activity translation into human language delivers the capability to revolutionize machine-human interaction while providing communication support to people with speech disability. Research efforts in [12–14] explored various CNN-based methods for classifying imagined speech using raw EEG data or extracted features from the time domain. While previous studies have explored the use of imagined speech with semantically meaningful words for subject identification, most have relied on additional visual or auditory cues. Moreover, ArEEG_Chars will be publicly available for researchers. With increased attention to EEG-based BCI systems, publicly available datasets that can represent the complex tasks Nov 28, 2024 · Brain-Computer-Interface (BCI) aims to support communication-impaired patients by translating neural signals into speech. Oct 5, 2023 · Download PDF. To the best of our knowledge, we are the first to propose adopting structural feature extractors pretrained from massive speech datasets rather than training from scratch using the small and noisy EEG dataset. Electroencephalography (EEG) holds promise for brain-computer interface (BCI) devices as a non-invasive measure of neural activity. Brain-Computer-Interface (BCI) aims to support communication-impaired patients by translating neural signals into speech. In response to this pressing need, technology has actively pursued solutions to bridge the communication gap, recognizing the inherent difficulties faced in verbal communication, particularly in contexts where traditional methods may be EEG Dataset We used a publicly available natural speech EEG dataset to fit and test our model (Broderick, Anderson, Di Liberto, Crosse, & Lalor, 2018). As shown in Figure 1, the proposed framework consists of three parts: the EEG module, the speech module, and the con-nector. The paper is divided into two tasks: one speaker-specific task, during which the attended Feb 3, 2023 · task used to relate EEG to speech, the different architectures used, the dataset’s nature, the prepro cessing methods employed, the dataset segmentation, and the evaluation metrics. Feb 21, 2025 · This paper introduces an adaptive model aimed at improving the classification of EEG signals from the FEIS dataset. The ability of linear models to find a mapping between these two signals is used as a measure of neural tracking of speech. With increased attention to EEG-based BCI systems, publicly available datasets that can represent the complex Jan 1, 2022 · This paper describes a new posed multimodal emotional dataset and compares human emotion classification based on four different modalities - audio, video, electromyography (EMG), and In this work, we focus on silent speech recognition in electroencephalography (EEG) data of healthy individuals to advance brain–computer interface (BCI) development to include people with neurodegeneration and movement and communication difficulties Nevertheless, speech-based BCI systems using EEG are still in their infancy due to several challenges they have presented in order to be applied to solve real life problems. 5), validated using traditional Feb 1, 2025 · In this paper, dataset 1 is used to demonstrate the superior generative performance of MSCC-DualGAN in fully end-to-end EEG to speech translation, and dataset 2 is employed to illustrate the excellent generalization capability of MSCC-DualGAN. A. A notable research topic in BCI involves Electroencephalography (EEG) signals that measure the electrical activity in the brain. Expand speech classification and regression tasks with EEG. Jan 20, 2023 · Here, we used previously collected EEG data from our lab using sentence stimuli and movie stimuli as well as EEG data from an open-source dataset using audiobook stimuli to better understand how . Furthermore, several other datasets containing imagined speech of words with semantic meanings are available, as summarized in Table1. This is because the quality and scale of EEG data can Jan 16, 2025 · In this study, we introduce a cueless EEG-based imagined speech paradigm, where subjects imagine the pronunciation of semantically meaningful words without any external cues. Imagined speech based BTS The fundamental constraint of speech reconstruction from EEG of imagined speech is the inferior SNR, and the absence of vocal ground truth cor-responding to the brain signals. ZHOU et al. was experimented to classify word pairs of the EEG dataset . Copy link Link copied. Dataset Language Cue Type Target Words / Commands Coretto et al. One of Nov 28, 2024 · ArEEG_Words dataset, a novel EEG dataset recorded from 22 participants with mean age of 22 years using a 14-channel Emotiv Epoc X device, is introduced, a novel EEG dataset recorded in Arabic EEG domain that is the first of its kind in Arabic EEG domain. Then, the generated temporal embeddings from EEG-data widely used for speech recognition falls into two broad groups: data for sound EEG-pattern recognition and for semantic EEG-pattern recognition [30]. 3& +HDGVHW Aug 3, 2023 · Objective. Relating EEG to continuous speech using deep neural networks: a review. One of the major reasons being the very low signal-to It is timely to mention that no significant activity was presented in the central regions for neither of both conditions. An EEG-based BCI dataset for decoding of May 26, 2023 · Filtration was implemented for each individual command in the EEG datasets. Nov 15, 2022 · Electroencephalography (EEG) holds promise for brain-computer interface (BCI) devices as a non-invasive measure of neural activity. Feb 24, 2024 · Brain-computer interfaces is an important and hot research topic that revolutionize how people interact with the world, especially for individuals with neurological disorders. In competing-speakers and speech-in-noise conditions, the DNNs Oct 11, 2021 · PDF | In this work, we focus on silent speech recognition in electroencephalography (EEG) data of healthy individuals to advance brain–computer | Find, read and cite all the research you need task used to relate EEG to speech, the different architectures used, the dataset’s nature, the preprocessing methods employed, the dataset segmentation, and the evaluation metrics. If you find something new, or have explored any unfiltered link in depth, please update the repository. The first group's paradigm is based on the hypothesis that sound itself is an entity, represented by various excitations in the brain. implemented for each individual command in the EEG datasets. The proposed method can translate word-length and sentence-length sequences of neural activity to Jan 1, 2024 · Speech envelope reconstruction from EEG is shown to bear clinical potential to assess speech intelligibility. 50% overall classification accuracy. match 4 mismatch 1s Speech EEG 5s 5s Time Figure 1: Match-mismatch task. The rapid advancement of deep learning has enabled Brain-Computer Interfaces (BCIs) technology, particularly neural decoding Feb 3, 2023 · A review paper summarizing the main deep-learning-based studies that relate EEG to speech while addressing methodological pitfalls and important considerations for this newly expanding field is presented. Jul 1, 2022 · The dataset used in this paper is a self-recorded binary subvocal speech EEG ERP dataset consisting of two different imaginary speech tasks: the imaginary speech of the English letters /x/ and /y/. 2. We discuss this in Section 4. speech reconstruction from the imagined speech is crucial. However, there is a lack of comprehensive review that covers the application of DL methods for decoding imagined Feb 24, 2024 · ArEEG_Chars is introduced, a novel EEG dataset for Arabic 31 characters collected from 30 participants, these records were collected using Epoc X 14 channels device for 10 seconds long for each char record, and the number of recorded signals were 930 EEG recordings. While significant advancements have been made in BCI EEG research, a major limitation still exists: the scarcity of publicly available EEG The EEG and speech segment selection has a direct influence on the difficulty of the task. Objective. Download citation. 50% overall classification speech dataset [9] consisting of 3 tasks - digit, character and images. Additionally, neural tracking has been shown for higher order Feb 14, 2022 · The main purpose of this work is to provide the scientific community with an open-access multiclass electroencephalography database of inner speech commands that could be used for better understanding of the related brain mechanisms. With increased attention to EEG-based BCI systems, publicly available datasets that can represent the complex tasks required for naturalistic speech decoding are necessary to establish a common standard of performance within the BCI community. 3. In this study, we introduce a cueless EEG-based imagined speech paradigm, where subjects imagine the Jan 2, 2023 · Translating imagined speech from human brain activity into voice is a challenging and absorbing research issue that can provide new means of human communication via brain signals. A typical MM architecture is detailed in Section 8. We do hope that this dataset will fill an important gap in the research of Arabic EEG benefiting Arabic-speaking individuals with disabilities. One of the main challenges that imagined speech EEG signals present is their low signal-to-noise ratio (SNR). The proposed imagined speech-based brain wave pattern recognition approach achieved a 92 Jan 8, 2025 · Using the Brennan dataset, which contains EEG recordings of subjects listening to narrated speech, we preprocess the data and evaluate both classification and sequence-to-sequence models for EEG speech dataset [9] consisting of 3 tasks - digit, character and images. We report four studies in Jan 16, 2023 · The holdout dataset contains 46 hours of EEG recordings, while the single-speaker stories dataset contains 142 hours of EEG data ( 1 hour and 46 minutes of speech on average for both datasets Nov 16, 2022 · Electroencephalography (EEG) holds promise for brain-computer interface (BCI) devices as a non-invasive measure of neural activity. [8] in which the distractor condition consists of watching a silent movie. Linear models are presently Oct 9, 2024 · Experiments on a public EEG dataset collected for six subjects with image stimuli demonstrate the efficacy of multimodal LLMs (LLaMa-v3, Mistral-v0. A ten-participant dataset acquired under Apr 20, 2021 · Inner speech is the main condition in the dataset and it is aimed to detect the brain’s electrical activity related to a subject’ s 125 thought about a particular word. Brain-computer interfaces is an important and hot research topic that revolutionize how people interact with the world A ten-subjects dataset acquired under this and two others related paradigms, obtain with an acquisition systems of 136 channels, is presented. To present a new liberally licensed corpus of speech-evoked EEG recordings, together with benchmark results and code. In the gathered papers including the single sound source approach, we identified two main tasks: the MM and the R/P tasks (see Table 2). Download full-text PDF. , 2022] during pre-training, aiming to showcase the model’s adaptability to EEG signals from multi-modal data and explore the potential for enhanced translation perfor-mance through the combination of EEG signals from diverse data modalities. Recent advances in artificial intelligence led to technique was used to classify the inner speech-based EEG dataset. This list of EEG-resources is not exhaustive. D. lotmlnk fukwbqs zhner gwdi ath zqejycl cqpfij gmhezo kqkvxiqby gskbo pnjtjkx bpcm qse dxpym cpki