Classification of Tweets Self-reporting Adverse Pregnancy Outcomes and Potential COVID-19 Cases Using RoBERTa Transformers Lung-Hao Lee author Man-Chen Hung author Chien-Huan Lu author Chang-Hao Chen author Po-Lei Lee author Kuo-Kai Shyu 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 lee-etal-2021-classification 10.18653/v1/2021.smm4h-1.18 https://aclanthology.org/2021.smm4h-1.18/ 2021-06 98 101