A Challenge Dataset and Effective Models for Aspect-Based Sentiment Analysis Qingnan Jiang author Lei Chen author Ruifeng Xu author Xiang Ao author Min Yang author 2019-11 text Proceedings of the 2019 Conference on Empirical Methods in Natural Language Processing and the 9th International Joint Conference on Natural Language Processing (EMNLP-IJCNLP) Kentaro Inui editor Jing Jiang editor Vincent Ng editor Xiaojun Wan editor Association for Computational Linguistics Hong Kong, China conference publication jiang-etal-2019-challenge 10.18653/v1/D19-1654 https://aclanthology.org/D19-1654/ 2019-11 6280 6285