SimCLS: A Simple Framework for Contrastive Learning of Abstractive Summarization Yixin Liu author Pengfei Liu author 2021-08 text Proceedings of the 59th Annual Meeting of the Association for Computational Linguistics and the 11th International Joint Conference on Natural Language Processing (Volume 2: Short Papers) Chengqing Zong editor Fei Xia editor Wenjie Li editor Roberto Navigli editor Association for Computational Linguistics Online conference publication liu-liu-2021-simcls 10.18653/v1/2021.acl-short.135 https://aclanthology.org/2021.acl-short.135/ 2021-08 1065 1072