COFFEE: A Contrastive Oracle-Free Framework for Event Extraction Meiru Zhang author Yixuan Su author Zaiqiao Meng author Zihao Fu author Nigel Collier author 2023-07 text Proceedings of the First Workshop on Matching From Unstructured and Structured Data (MATCHING 2023) Estevam Hruschka editor Tom Mitchell editor Sajjadur Rahman editor Dunja Mladenić editor Marko Grobelnik editor Association for Computational Linguistics Toronto, ON, Canada conference publication zhang-etal-2023-coffee 10.18653/v1/2023.matching-1.4 https://aclanthology.org/2023.matching-1.4/ 2023-07 33 44