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.

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
The point in time of Lufthansa Flight 502 was what?