1. Human-computer Interaction Institute, Carnegie Mellon University, United States and College of Information Studies, University of Maryland, United States
2. Language Technologies Institute, Carnegie Mellon University, United States
3. Carnegie Mellon University, United States
4. Robotics Institute, Carnegie Mellon University, United States
5. Human-Computer Interaction Institute, Carnegie Mellon University, United States
6. Department of Computer Science, University of Texas, Austin, United States