Task: Question Generation
Input (English): Context : Lufthansa Flight 502 was a scheduled flight from Hamburg, Germany to Buenos Aires, Argentina; on 11 January 1959, the flight was being operated by a Lockheed L-1049G Super Constellation (registration D-ALAK). 
Subject : Lufthansa Flight 502 
Relation : point in time
Output (English): The point in time of Lufthansa Flight 502 was what?