SpanMlt: A Span-based Multi-Task Learning Framework for Pair-wise Aspect and Opinion Terms Extraction He Zhao author Longtao Huang author Rong Zhang author Quan Lu author Hui Xue author 2020-07 text Proceedings of the 58th Annual Meeting of the Association for Computational Linguistics Dan Jurafsky editor Joyce Chai editor Natalie Schluter editor Joel Tetreault editor Association for Computational Linguistics Online conference publication zhao-etal-2020-spanmlt 10.18653/v1/2020.acl-main.296 https://aclanthology.org/2020.acl-main.296/ 2020-07 3239 3248