Convolution over Hierarchical Syntactic and Lexical Graphs for Aspect Level Sentiment Analysis Mi Zhang author Tieyun Qian author 2020-11 text Proceedings of the 2020 Conference on Empirical Methods in Natural Language Processing (EMNLP) Bonnie Webber editor Trevor Cohn editor Yulan He editor Yang Liu editor Association for Computational Linguistics Online conference publication zhang-qian-2020-convolution 10.18653/v1/2020.emnlp-main.286 https://aclanthology.org/2020.emnlp-main.286/ 2020-11 3540 3549