Comparative Opinion Quintuple Extraction from Product Reviews Ziheng Liu author Rui Xia author Jianfei Yu author 2021-11 text Proceedings of the 2021 Conference on Empirical Methods in Natural Language Processing Marie-Francine Moens editor Xuanjing Huang editor Lucia Specia editor Scott Wen-tau Yih editor Association for Computational Linguistics Online and Punta Cana, Dominican Republic conference publication liu-etal-2021-comparative 10.18653/v1/2021.emnlp-main.322 https://aclanthology.org/2021.emnlp-main.322/ 2021-11 3955 3965