Biomedical Event Extraction with Hierarchical Knowledge Graphs Kung-Hsiang Huang author Mu Yang author Nanyun Peng author 2020-11 text Findings of the Association for Computational Linguistics: EMNLP 2020 Trevor Cohn editor Yulan He editor Yang Liu editor Association for Computational Linguistics Online conference publication huang-etal-2020-biomedical 10.18653/v1/2020.findings-emnlp.114 https://aclanthology.org/2020.findings-emnlp.114/ 2020-11 1277 1285