Teacher:Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.
Teacher: Now, understand the problem? Solve this instance: The 1974 Norfolk mid-air collision happened on 9 August 1974 at Fordham Fen, Norfolk, England when a Royal Air Force McDonnell-Douglas Phantom FGR2 of 41 Squadron collided with a Piper Pawnee crop spraying aircraft.
Student:
The point in time of 1974 Norfolk mid-air collision was when?