UniEX: An Effective and Efficient Framework for Unified Information Extraction via a Span-extractive Perspective Yang Ping author JunYu Lu author Ruyi Gan author Junjie Wang author Yuxiang Zhang author Pingjian Zhang author Jiaxing Zhang author 2023-07 text Proceedings of the 61st Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers) Anna Rogers editor Jordan Boyd-Graber editor Naoaki Okazaki editor Association for Computational Linguistics Toronto, Canada conference publication ping-etal-2023-uniex 10.18653/v1/2023.acl-long.907 https://aclanthology.org/2023.acl-long.907/ 2023-07 16424 16440