Structure-Discourse Hierarchical Graph for Conditional Question Answering on Long Documents Haowei Du author Yansong Feng author Chen Li author Yang Li author Yunshi Lan author Dongyan Zhao 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 du-etal-2023-structure 10.18653/v1/2023.findings-acl.391 https://aclanthology.org/2023.findings-acl.391/ 2023-07 6282 6293