Bridge to Target Domain by Prototypical Contrastive Learning and Label Confusion: Re-explore Zero-Shot Learning for Slot Filling Liwen Wang author Xuefeng Li author Jiachi Liu author Keqing He author Yuanmeng Yan author Weiran Xu author 2021-11 text Proceedings of the 2021 Conference on Empirical Methods in Natural Language Processing Marie-Francine Moens editor Xuanjing Huang editor Lucia Specia editor Scott Wen-tau Yih editor Association for Computational Linguistics Online and Punta Cana, Dominican Republic conference publication wang-etal-2021-bridge 10.18653/v1/2021.emnlp-main.746 https://aclanthology.org/2021.emnlp-main.746/ 2021-11 9474 9480