Unified Structure Generation for Universal Information Extraction Yaojie Lu author Qing Liu author Dai Dai author Xinyan Xiao author Hongyu Lin author Xianpei Han author Le Sun author Hua Wu author 2022-05 text Proceedings of the 60th Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers) Smaranda Muresan editor Preslav Nakov editor Aline Villavicencio editor Association for Computational Linguistics Dublin, Ireland conference publication lu-etal-2022-unified 10.18653/v1/2022.acl-long.395 https://aclanthology.org/2022.acl-long.395/ 2022-05 5755 5772