Initial commit
Browse files- README.md +173 -0
- config.json +33 -0
- pytorch_model.bin +3 -0
- special_tokens_map.json +3 -0
- spiece.model +3 -0
- spiece.vocab +0 -0
- tokenizer_config.json +2 -0
README.md
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---
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language: fr
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license: apache-2.0
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datasets:
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- wikipedia
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---
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# FrALBERT Base Cased
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Pretrained model on French language using a masked language modeling (MLM) objective. It was introduced in
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[this paper](https://arxiv.org/abs/1909.11942) and first released in
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[this repository](https://github.com/google-research/albert).
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This model, unlike other ALBERT models, is cased: it does make a difference between french and French.
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## Model description
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FrALBERT is a transformers model pretrained on 16Go of French Wikipedia in a self-supervised fashion. This means it
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was pretrained on the raw texts only, with no humans labelling them in any way (which is why it can use lots of
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publicly available data) with an automatic process to generate inputs and labels from those texts. More precisely, it
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was pretrained with two objectives:
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- Masked language modeling (MLM): taking a sentence, the model randomly masks 15% of the words in the input then run
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the entire masked sentence through the model and has to predict the masked words. This is different from traditional
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recurrent neural networks (RNNs) that usually see the words one after the other, or from autoregressive models like
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GPT which internally mask the future tokens. It allows the model to learn a bidirectional representation of the
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sentence.
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- Sentence Ordering Prediction (SOP): FrALBERT uses a pretraining loss based on predicting the ordering of two consecutive segments of text.
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This way, the model learns an inner representation of the English language that can then be used to extract features
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useful for downstream tasks: if you have a dataset of labeled sentences for instance, you can train a standard
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classifier using the features produced by the FrALBERT model as inputs.
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FrALBERT is particular in that it shares its layers across its Transformer. Therefore, all layers have the same weights. Using repeating layers results in a small memory footprint, however, the computational cost remains similar to a BERT-like architecture with the same number of hidden layers as it has to iterate through the same number of (repeating) layers.
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This is the second version of the base model.
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This model has the following configuration:
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- 12 repeating layers
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- 128 embedding dimension
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- 768 hidden dimension
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- 12 attention heads
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- 11M parameters
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## Intended uses & limitations
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You can use the raw model for either masked language modeling or next sentence prediction, but it's mostly intended to
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be fine-tuned on a downstream task. See the [model hub](https://huggingface.co/models?filter=fralbert-base-cased) to look for
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fine-tuned versions on a task that interests you.
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Note that this model is primarily aimed at being fine-tuned on tasks that use the whole sentence (potentially masked)
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to make decisions, such as sequence classification, token classification or question answering. For tasks such as text
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generation you should look at model like GPT2.
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### How to use
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You can use this model directly with a pipeline for masked language modeling:
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```python
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>>> from transformers import pipeline
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>>> unmasker = pipeline('fill-mask', model='cservan/fralbert-base-cased')
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>>> unmasker("Paris est la capitale de la [MASK] .")
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[
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{
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"sequence": "paris est la capitale de la france.",
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"score": 0.6231236457824707,
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"token": 3043,
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"token_str": "france"
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},
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{
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"sequence": "paris est la capitale de la region.",
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"score": 0.2993471622467041,
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"token": 10531,
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"token_str": "region"
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},
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{
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"sequence": "paris est la capitale de la societe.",
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"score": 0.02028230018913746,
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"token": 24622,
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"token_str": "societe"
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},
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{
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"sequence": "paris est la capitale de la bretagne.",
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"score": 0.012089950032532215,
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"token": 24987,
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"token_str": "bretagne"
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},
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{
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"sequence": "paris est la capitale de la chine.",
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"score": 0.010002839379012585,
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"token": 14860,
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"token_str": "chine"
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}
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]
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```
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Here is how to use this model to get the features of a given text in PyTorch:
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```python
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from transformers import AlbertTokenizer, AlbertModel
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tokenizer = AlbertTokenizer.from_pretrained('cservan/fralbert-base-cased')
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model = AlbertModel.from_pretrained("cservan/fralbert-base-cased")
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text = "Remplacez-moi par le texte en français que vous souhaitez."
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encoded_input = tokenizer(text, return_tensors='pt')
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output = model(**encoded_input)
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```
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and in TensorFlow:
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```python
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from transformers import AlbertTokenizer, TFAlbertModel
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tokenizer = AlbertTokenizer.from_pretrained('cservan/fralbert-base-cased')
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model = TFAlbertModel.from_pretrained("cservan/fralbert-base-cased")
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text = "Remplacez-moi par le texte en français que vous souhaitez."
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encoded_input = tokenizer(text, return_tensors='tf')
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output = model(encoded_input)
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```
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## Training data
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The FrALBERT model was pretrained on 4go of [French Wikipedia](https://fr.wikipedia.org/wiki/French_Wikipedia) (excluding lists, tables and
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headers).
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## Training procedure
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### Preprocessing
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The texts are lowercased and tokenized using SentencePiece and a vocabulary size of 32,000. The inputs of the model are
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then of the form:
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```
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[CLS] Sentence A [SEP] Sentence B [SEP]
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```
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### Training
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The FrALBERT procedure follows the BERT setup.
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The details of the masking procedure for each sentence are the following:
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- 15% of the tokens are masked.
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- In 80% of the cases, the masked tokens are replaced by `[MASK]`.
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- In 10% of the cases, the masked tokens are replaced by a random token (different) from the one they replace.
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- In the 10% remaining cases, the masked tokens are left as is.
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## Evaluation results
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When fine-tuned on downstream tasks, the ALBERT models achieve the following results:
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Slot-filling:
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| | FrALBERT-base | FrALBERT-base-cased
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|----------------|---------------|--------------------
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| MEDIA | 81.76 (0.59) | 85.09 (0.14)
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### BibTeX entry and citation info
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```bibtex
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@inproceedings{cattan2021fralbert,
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author = {Oralie Cattan and
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Christophe Servan and
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Sophie Rosset},
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booktitle = {Recent Advances in Natural Language Processing, RANLP 2021},
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title = {{On the Usability of Transformers-based models for a French Question-Answering task}},
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year = {2021},
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address = {Online},
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month = sep,
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}
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```
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Link to the paper: [PDF](https://hal.archives-ouvertes.fr/hal-03336060)
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config.json
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{
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"architectures": [
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"AlbertForMaskedLM"
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],
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"attention_probs_dropout_prob": 0,
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"bos_token_id": 2,
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"classifier_dropout_prob": 0.1,
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"down_scale_factor": 1,
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"embedding_size": 128,
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"eos_token_id": 3,
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"eos_token_ids": null,
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"gap_size": 0,
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"hidden_act": "gelu_new",
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"hidden_dropout_prob": 0,
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"hidden_size": 768,
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"initializer_range": 0.02,
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"inner_group_num": 1,
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"intermediate_size": 3072,
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"layer_norm_eps": 1e-12,
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"max_position_embeddings": 512,
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"model_type": "albert",
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"net_structure_type": 0,
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"num_attention_heads": 12,
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"num_hidden_groups": 1,
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"num_hidden_layers": 12,
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"num_memory_blocks": 0,
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"output_past": true,
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"pad_token_id": 0,
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"position_embedding_type": "absolute",
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"transformers_version": "4.24.0",
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"type_vocab_size": 2,
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"vocab_size": 32000
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}
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pytorch_model.bin
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version https://git-lfs.github.com/spec/v1
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oid sha256:86789a8f6e22063bce5c8c944db629b7c1c5544761d4a6ecf0bc9b8540a653bc
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size 64676287
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special_tokens_map.json
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{"bos_token": "[CLS]", "eos_token": "[SEP]", "unk_token": "<unk>", "sep_token": "[SEP]", "pad_token": "<pad>", "cls_token": "[CLS]", "mask_token": "[MASK]"}
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spiece.model
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version https://git-lfs.github.com/spec/v1
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oid sha256:f84b84d236af93fa229f8c3e400c02b31c8532e61b1b927f609a8b470d4afb71
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size 737469
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spiece.vocab
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tokenizer_config.json
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{"keep_accents": true, "do_lower_case": false}
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