Yang Liu author Yuanhe Tian author Tsung-Hui Chang author Song Wu author Xiang Wan author Yan Song author 2021-06 text Dina Demner-Fushman editor Kevin Bretonnel Cohen editor Sophia Ananiadou editor Junichi Tsujii editor Association for Computational Linguistics Online conference publication liu-etal-2021-exploring 10.18653/v1/2021.bionlp-1.23 https://aclanthology.org/2021.bionlp-1.23/ 2021-06 213 220