Overview of the Fourth Social Media Mining for Health (SMM4H) Shared Tasks at ACL 2019 Davy Weissenbacher author Abeed Sarker author Arjun Magge author Ashlynn Daughton author Karen O’Connor author Michael J Paul author Graciela Gonzalez-Hernandez author 2019-08 text Proceedings of the Fourth Social Media Mining for Health Applications (#SMM4H) Workshop & Shared Task Davy Weissenbacher editor Graciela Gonzalez-Hernandez editor Association for Computational Linguistics Florence, Italy conference publication weissenbacher-etal-2019-overview 10.18653/v1/W19-3203 https://aclanthology.org/W19-3203/ 2019-08 21 30