CCPrefix: Counterfactual Contrastive Prefix-Tuning for Many-Class Classification Yang Li author Canran Xu author Guodong Long author Tao Shen author Chongyang Tao author Jing Jiang author 2024-03 text Proceedings of the 18th Conference of the European Chapter of the Association for Computational Linguistics (Volume 1: Long Papers) Yvette Graham editor Matthew Purver editor Association for Computational Linguistics St. Julian’s, Malta conference publication li-etal-2024-ccprefix 10.18653/v1/2024.eacl-long.181 https://aclanthology.org/2024.eacl-long.181/ 2024-03 2977 2988