Open Relation and Event Type Discovery with Type Abstraction Sha Li author Heng Ji author Jiawei Han author 2022-12 text Proceedings of the 2022 Conference on Empirical Methods in Natural Language Processing Yoav Goldberg editor Zornitsa Kozareva editor Yue Zhang editor Association for Computational Linguistics Abu Dhabi, United Arab Emirates conference publication li-etal-2022-open 10.18653/v1/2022.emnlp-main.461 https://aclanthology.org/2022.emnlp-main.461/ 2022-12 6864 6877