Task: Question Generation
Input (English): Context : The 2013 Lake Grassmere earthquake was a magnitude 6.6 earthquake that occurred at 2:31:05 pm (NZST) on Friday 16 August 2013. 
Subject : 2013 Lake Grassmere earthquake 
Relation : point in time
Output (English): On what date did 2013 Lake Grassmere earthquake take place?