Multi-level Emotion Cause Analysis by Multi-head Attention Based Multi-task Learning Li Xiangju author Feng Shi author Zhang Yifei author Wang Daling author 2021-08 text eng Proceedings of the 20th Chinese National Conference on Computational Linguistics Sheng Li editor Maosong Sun editor Yang Liu editor Hua Wu editor Kang Liu editor Wanxiang Che editor Shizhu He editor Gaoqi Rao editor Chinese Information Processing Society of China Huhhot, China conference publication xiangju-etal-2021-multi https://aclanthology.org/2021.ccl-1.83/ 2021-08 928 939