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This cased model was pretrained from scratch using a custom vocabulary on the following corpora

  • Pubmed
  • Clinical trials corpus
  • and a small subset of Bookcorpus

The pretrained model was used to do NER as is, with no fine-tuning. The approach is described in this post. Towards Data Science review

App in Spaces demonstrates this approach.

Github link to perform NER using this model in an ensemble with bert-base cased.

The ensemble detects 69 entity subtypes (17 broad entity groups)

Ensemble model performance

Additional notes

  • The model predictions on the right do not include [CLS] predictions. Hosted inference API only returns the masked position predictions. In practice, the [CLS] predictions are just as useful as the model predictions for the masked position (if the next sentence prediction loss was low during pretraining) and are used for NER.
  • Some of the top model predictions like "a", "the", punctuations, etc. while valid predictions, bear no entity information. These are filtered when harvesting descriptors for NER. The examples on the right are unfiltered results.
  • Use this link to examine both fill-mask prediction and [CLS] predictions

License

MIT license

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This model can be loaded on the Inference API on-demand.

Spaces using ajitrajasekharan/biomedical 18