HierarchicalContrast: A Coarse-to-Fine Contrastive Learning Framework for Cross-Domain Zero-Shot Slot Filling Junwen Zhang author Yin Zhang author 2023-12 text Findings of the Association for Computational Linguistics: EMNLP 2023 Houda Bouamor editor Juan Pino editor Kalika Bali editor Association for Computational Linguistics Singapore conference publication zhang-zhang-2023-hierarchicalcontrast 10.18653/v1/2023.findings-emnlp.965 https://aclanthology.org/2023.findings-emnlp.965/ 2023-12 14483 14503