Improving Chemical Named Entity Recognition in Patents with Contextualized Word Embeddings Zenan Zhai author Dat Quoc Nguyen author Saber Akhondi author Camilo Thorne author Christian Druckenbrodt author Trevor Cohn author Michelle Gregory author Karin Verspoor author 2019-08 text Proceedings of the 18th BioNLP Workshop and Shared Task Dina Demner-Fushman editor Kevin Bretonnel Cohen editor Sophia Ananiadou editor Junichi Tsujii editor Association for Computational Linguistics Florence, Italy conference publication zhai-etal-2019-improving 10.18653/v1/W19-5035 https://aclanthology.org/W19-5035/ 2019-08 328 338