1. University of Washington, USA. zeqiuwu1@uw.edu
2. University of Washington, USA. rparish@uw.edu
3. Microsoft Research, USA. chehao@microsoft.com
4. University of Washington, USA. sewon@uw.edu
5. Allen Institute for AI, USA. raja@allenai.org
6. University of Washington, USA. ostendor@uw.edu
7. University of Washington, USA. hannaneh@uw.edu
8. Allen Institute for AI, USA