Task: Question Generation
Input (English): Context : The 1971 January 22 Surgut Aeroflot Antonov An-12 crash occurred on 22 January 1971, when an Aeroflot Antonov An-12B, registered CCCP-11000, flying from Omsk Tsentralny Airport, in the Soviet Union‍ '​s Russian Soviet Federated Socialist Republic (RSFSR), crashed 15 km (9.3 mi) short of the runway on approach to Surgut International Airport, Surgut, RSFSR. 
Subject : 1971 January 22 Surgut Aeroflot Antonov An-12 crash 
Relation : point in time
Output (English): On what date did 1971 January 22 Surgut Aeroflot Antonov An-12 crash take place?