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.

[EX Q]: Context : The 1957 Nutts Corner BEA Viscount crash was a British European Airways (BEA) flight from London to Belfast that crashed at Nutts Corner Airport on 23 October 1957, killing all seven passengers and crew. 
Answer : 23 October 1957
[EX A]: The date of 1957 Nutts Corner BEA Viscount crash?

[EX Q]: Context : Gabriel Betancourt divorced his wife Yolanda Pulecio in 1980 and was granted custody of his daughters. 
Answer : Yolanda Pulecio
[EX A]: What is Gabriel Betancourt's spouse's name?

[EX Q]: Context : The Karaiskakis Stadium disaster was an incident that occurred on 8 February 1981, in the Karaiskakis Stadium in Neo Faliro, Piraeus, Greece, after the conclusion of a football match between Olympiacos and AEK Athens. 
Answer : 8 February 1981
[EX A]:
When did Karaiskakis Stadium disaster occur?