ULTRA: Unleash LLMs’ Potential for Event Argument Extraction through Hierarchical Modeling and Pair-wise Self-Refinement Xinliang Frederick Zhang author Carter Blum author Temma Choji author Shalin Shah author Alakananda Vempala author 2024-08 text Findings of the Association for Computational Linguistics: ACL 2024 Lun-Wei Ku editor Andre Martins editor Vivek Srikumar editor Association for Computational Linguistics Bangkok, Thailand conference publication zhang-etal-2024-ultra 10.18653/v1/2024.findings-acl.487 https://aclanthology.org/2024.findings-acl.487/ 2024-08 8172 8185