USSA: A Unified Table Filling Scheme for Structured Sentiment Analysis Zepeng Zhai author Hao Chen author Ruifan Li author Xiaojie Wang 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 zhai-etal-2023-ussa 10.18653/v1/2023.acl-long.802 https://aclanthology.org/2023.acl-long.802/ 2023-07 14340 14353