Liu, Shifeng, Yifang Sun, Bing Li, Wei Wang, and Xiang Zhao. “HAMNER: Headword Amplified Multi-Span Distantly Supervised Method for Domain Specific Named Entity Recognition”. Proceedings of the AAAI Conference on Artificial Intelligence 34, no. 05 (April 3, 2020): 8401-8408. Accessed February 4, 2023. https://ojs.aaai.org/index.php/AAAI/article/view/6358.