Improving BERT Model Using Contrastive Learning for Biomedical Relation Extraction Peng Su author Yifan Peng author K Vijay-Shanker author 2021-06 text Proceedings of the 20th Workshop on Biomedical Language Processing Dina Demner-Fushman editor Kevin Bretonnel Cohen editor Sophia Ananiadou editor Junichi Tsujii editor Association for Computational Linguistics Online conference publication su-etal-2021-improving 10.18653/v1/2021.bionlp-1.1 https://aclanthology.org/2021.bionlp-1.1/ 2021-06 1 10