GCN with External Knowledge for Clinical Event Detection Liu Dan author Zhang Zhichang author Peng Hui author Han Ruirui author 2021-08 text eng Proceedings of the 20th Chinese National Conference on Computational Linguistics Sheng Li editor Maosong Sun editor Yang Liu editor Hua Wu editor Kang Liu editor Wanxiang Che editor Shizhu He editor Gaoqi Rao editor Chinese Information Processing Society of China Huhhot, China conference publication dan-etal-2021-gcn https://aclanthology.org/2021.ccl-1.106/ 2021-08 1190 1201