Haopeng Zhang author Xiao Liu author Jiawei Zhang author 2023-07 text Michael Strube editor Chloe Braud editor Christian Hardmeier editor Junyi Jessy Li editor Sharid Loaiciga editor Amir Zeldes editor Association for Computational Linguistics Toronto, Canada conference publication zhang-etal-2023-contrastive-hierarchical 10.18653/v1/2023.codi-1.4 https://aclanthology.org/2023.codi-1.4/ 2023-07 37 47