Understanding Pre-trained BERT for Aspect-based Sentiment Analysis Hu Xu author Lei Shu author Philip Yu author Bing Liu author 2020-12 text Proceedings of the 28th International Conference on Computational Linguistics Donia Scott editor Nuria Bel editor Chengqing Zong editor International Committee on Computational Linguistics Barcelona, Spain (Online) conference publication xu-etal-2020-understanding 10.18653/v1/2020.coling-main.21 https://aclanthology.org/2020.coling-main.21/ 2020-12 244 250