Task: Question Generation
Input (English): Context : The 1949 Air France Lockheed Constellation crash on 28 October 1949 happened when a Lockheed L-749A-79-46 Constellation of Air France crashed into a mountain while attempting to land at Santa Maria Airport, Azores on a stopover during a scheduled international passenger flight from Paris-Orly Airport to New York City. 
Subject : 1949 Air France Lockheed Constellation crash 
Relation : point in time
Output (English): When did 1949 Air France Lockheed Constellation crash occurr?