David A. Broniatowski is with the Institute for Data, Democracy, and Politics, and the Department of Engineering Management and Systems Engineering, School of Engineering and Applied Science, The George Washington University, Washington, DC. Mark Dredze is with the Department of Computer Science, Johns Hopkins University, Baltimore, MD. John W. Ayers is with the Division of Infectious Diseases and Global Public Health, Department of Medicine, and the Center for Data Driven Health, Qualcomm Institute,...