H-FND: Hierarchical False-Negative Denoising for Distant Supervision Relation Extraction Jhih-wei Chen author Tsu-Jui Fu author Chen-Kang Lee author Wei-Yun Ma author 2021-08 text Findings of the Association for Computational Linguistics: ACL-IJCNLP 2021 Chengqing Zong editor Fei Xia editor Wenjie Li editor Roberto Navigli editor Association for Computational Linguistics Online conference publication chen-etal-2021-h 10.18653/v1/2021.findings-acl.228 https://aclanthology.org/2021.findings-acl.228/ 2021-08 2579 2593