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.
Problem:Context : On 12 September 2012 at about 12:20 local time (00:20 UTC), Petropavlovsk-Kamchatsky Air Flight 251, operated by an Antonov An-28, crashed while attempting to land at Palana Airport in Russia.
Answer : 12 September 2012
Solution:
What was the date of Petropavlovsk-Kamchatsky Air Flight 251?