Task: Question Generation
Input (English): Context : Operation Chengiz Khan was the code name assigned to the preemptive strikes carried out by the Pakistani Air Force (PAF) on the forward airbases and radar installations of the Indian Air Force (IAF) on the evening of 3 December 1971, and marked the formal initiation of hostilities of the Indo-Pakistani War of 1971. 
Answer : 3 December 1971
Output (English): What is the full date that Operation Chengiz Khan crashed on?