Instructions: You will be given a context, a subject and a relation. Your task is to generate a question based on the subject and relation. The generated question should include the given subject. Try to use a minimum number of words that are not present in either context, subject or relation while generating question.
Input: 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:
On what date did 1971 January 22 Surgut Aeroflot Antonov An-12 crash take place?