Negation Scope Refinement via Boundary Shift Loss Yin Wu author Aixin Sun author 2023-07 text Findings of the Association for Computational Linguistics: ACL 2023 Anna Rogers editor Jordan Boyd-Graber editor Naoaki Okazaki editor Association for Computational Linguistics Toronto, Canada conference publication wu-sun-2023-negation 10.18653/v1/2023.findings-acl.379 https://aclanthology.org/2023.findings-acl.379/ 2023-07 6090 6099