Task: Question Generation
Input (English): Context : Jathibhanga massacre (Bengali: জাঠিভাঙ্গা হত্যাকান্ড) was a massacre of the emigrating Bengali population in the Jathibhanga area of Shukhanpukuri Union under Thakurgaon sub-division of greater Dinajpur district on 23 April 1971 by the Pakistani Army in collaboration with the Razakars. 
Subject : Jathibhanga massacre 
Relation : point in time
Output (English): On what date did Jathibhanga massacre take place?