Task: Question Answering
Input (English): We use the Dialogue State Tracking Competition 2 (DSTC2) dataset BIBREF27 which is the most widely used dataset for research on task-oriented chatbots.  We also used two other datasets recently open-sourced by Google Research BIBREF28 which are M2M-sim-M (dataset in movie domain) and M2M-sim-R (dataset in restaurant domain).  
 Question: What are the three datasets used?
Output (English): DSTC2 M2M-sim-M M2M-sim-R