1. Robotics Institute, Carnegie Mellon University, United States
2. Carnegie Mellon University, United States
3. School of Information and Computer Sciences, University of California, Irvine, United States and Connected Learning Lab, University of California Irvine, United States
4. University of California, Irvine, United States
5. Language Technologies Institute, Carnegie Mellon University, United States
6. School of Education / Creativity Labs, University of California, Irvine, United States