Improving Event Detection via Open-domain Trigger Knowledge Meihan Tong author Bin Xu author Shuai Wang author Yixin Cao author Lei Hou author Juanzi Li author Jun Xie author 2020-07 text Proceedings of the 58th Annual Meeting of the Association for Computational Linguistics Dan Jurafsky editor Joyce Chai editor Natalie Schluter editor Joel Tetreault editor Association for Computational Linguistics Online conference publication tong-etal-2020-improving 10.18653/v1/2020.acl-main.522 https://aclanthology.org/2020.acl-main.522/ 2020-07 5887 5897