CLINE: Contrastive Learning with Semantic Negative Examples for Natural Language Understanding Dong Wang author Ning Ding author Piji Li author Haitao Zheng 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 1: Long Papers) Chengqing Zong editor Fei Xia editor Wenjie Li editor Roberto Navigli editor Association for Computational Linguistics Online conference publication wang-etal-2021-cline 10.18653/v1/2021.acl-long.181 https://aclanthology.org/2021.acl-long.181/ 2021-08 2332 2342