ChemNER: Fine-Grained Chemistry Named Entity Recognition with Ontology-Guided Distant Supervision Xuan Wang author Vivian Hu author Xiangchen Song author Shweta Garg author Jinfeng Xiao author Jiawei Han author 2021-11 text Proceedings of the 2021 Conference on Empirical Methods in Natural Language Processing Marie-Francine Moens editor Xuanjing Huang editor Lucia Specia editor Scott Wen-tau Yih editor Association for Computational Linguistics Online and Punta Cana, Dominican Republic conference publication wang-etal-2021-chemner 10.18653/v1/2021.emnlp-main.424 https://aclanthology.org/2021.emnlp-main.424/ 2021-11 5227 5240