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# COVID-Twitter-BERT (CT-BERT)
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BERT-large-uncased model, pretrained on a corpus of messages from Twitter about COVID-19
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---
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language: "en"
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thumbnail: "https://raw.githubusercontent.com/digitalepidemiologylab/covid-twitter-bert/master/images/COVID-Twitter-BERT_small.png"
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tags:
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- Twitter
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- COVID-19
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license: "MIT"
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---
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# COVID-Twitter-BERT (CT-BERT) v1
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:warning: _You may want to use the [v2 model](https://huggingface.co/digitalepidemiologylab/covid-twitter-bert-v2) which was trained on more recent data and yields better performance_ :warning:
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BERT-large-uncased model, pretrained on a corpus of messages from Twitter about COVID-19. Find more info on our [GitHub page](https://github.com/digitalepidemiologylab/covid-twitter-bert).
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## Overview
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This model was trained on 160M tweets collected between January 12 and April 16, 2020 containing at least one of the keywords "wuhan", "ncov", "coronavirus", "covid", or "sars-cov-2". These tweets were filtered and preprocessed to reach a final sample of 22.5M tweets (containing 40.7M sentences and 633M tokens) which were used for training.
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@ -14,5 +27,25 @@ tokenizer = AutoTokenizer.from_pretrained("digitalepidemiologylab/covid-twitter-
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model = AutoModel.from_pretrained("digitalepidemiologylab/covid-twitter-bert")
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```
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You can also use the model with the `pipeline` interface:
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```python
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from transformers import pipeline
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import json
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pipe = pipeline(task='fill-mask', model='digitalepidemiologylab/covid-twitter-bert-v2')
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out = pipe(f"In places with a lot of people, it's a good idea to wear a {pipe.tokenizer.mask_token}")
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print(json.dumps(out, indent=4))
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[
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{
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"sequence": "[CLS] in places with a lot of people, it's a good idea to wear a mask [SEP]",
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"score": 0.9959408044815063,
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"token": 7308,
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"token_str": "mask"
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},
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...
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]
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```
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## References
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[1] Martin Müller, Marcel Salaté, Per E Kummervold. "COVID-Twitter-BERT: A Natural Language Processing Model to Analyse COVID-19 Content on Twitter" arXiv preprint arXiv:2005.07503 (2020).
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