Contrastive Learning with Prompt-derived Virtual Semantic Prototypes for Unsupervised Sentence Embedding Jiali Zeng author Yongjing Yin author Yufan Jiang author Shuangzhi Wu author Yunbo Cao author 2022-12 text Findings of the Association for Computational Linguistics: EMNLP 2022 Yoav Goldberg editor Zornitsa Kozareva editor Yue Zhang editor Association for Computational Linguistics Abu Dhabi, United Arab Emirates conference publication zeng-etal-2022-contrastive 10.18653/v1/2022.findings-emnlp.522 https://aclanthology.org/2022.findings-emnlp.522/ 2022-12 7042 7053