Detailed Instructions: Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.
Q: Context : The 1961 Derby Aviation crash refers to the fatal crash of a Douglas Dakota IV, registration G-AMSW, operated by Derby Aviation, a subsidiary of British Midland Airways, on the mountain of Canigou, France, on 7 October 1961.
Answer : 7 October 1961
A:
On what date did 1961 Derby Aviation crash occur?