Using the Past Knowledge to Improve Sentiment Classification Qi Qin author Wenpeng Hu author Bing Liu 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 qin-etal-2020-using 10.18653/v1/2020.findings-emnlp.101 https://aclanthology.org/2020.findings-emnlp.101/ 2020-11 1124 1133