RBPB: Regularization-Based Pattern Balancing Method for Event Extraction Lei Sha author Jing Liu author Chin-Yew Lin author Sujian Li author Baobao Chang author Zhifang Sui 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 sha-etal-2016-rbpb 10.18653/v1/P16-1116 https://aclanthology.org/P16-1116/ 2016-08 1224 1234