Grid Tagging Scheme for Aspect-oriented Fine-grained Opinion Extraction Zhen Wu author Chengcan Ying author Fei Zhao author Zhifang Fan author Xinyu Dai author Rui Xia author 2020-11 text Findings of the Association for Computational Linguistics: EMNLP 2020 Trevor Cohn editor Yulan He editor Yang Liu editor Association for Computational Linguistics Online conference publication wu-etal-2020-grid 10.18653/v1/2020.findings-emnlp.234 https://aclanthology.org/2020.findings-emnlp.234/ 2020-11 2576 2585