Liberal Event Extraction and Event Schema Induction Lifu Huang author Taylor Cassidy author Xiaocheng Feng author Heng Ji author Clare R Voss author Jiawei Han author Avirup Sil author 2016-08 text Proceedings of the 54th Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers) Katrin Erk editor Noah A Smith editor Association for Computational Linguistics Berlin, Germany conference publication huang-etal-2016-liberal 10.18653/v1/P16-1025 https://aclanthology.org/P16-1025/ 2016-08 258 268