Classification, Extraction, and Normalization : CASIA_Unisound Team at the Social Media Mining for Health 2021 Shared Tasks Tong Zhou author Zhucong Li author Zhen Gan author Baoli Zhang author Yubo Chen author Kun Niu author Jing Wan author Kang Liu author Jun Zhao author Yafei Shi author Weifeng Chong author Shengping Liu author 2021-06 text Proceedings of the Sixth Social Media Mining for Health (#SMM4H) Workshop and Shared Task Arjun Magge editor Ari Klein editor Antonio Miranda-Escalada editor Mohammed Ali Al-garadi editor Ilseyar Alimova editor Zulfat Miftahutdinov editor Eulalia Farre-Maduell editor Salvador Lima Lopez editor Ivan Flores editor Karen O’Connor editor Davy Weissenbacher editor Elena Tutubalina editor Abeed Sarker editor Juan M Banda editor Martin Krallinger editor Graciela Gonzalez-Hernandez editor Association for Computational Linguistics Mexico City, Mexico conference publication zhou-etal-2021-classification 10.18653/v1/2021.smm4h-1.13 https://aclanthology.org/2021.smm4h-1.13/ 2021-06 77 82