Definition: 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.
Input: Context : Andrew Edward McKeever DSO, MC & Bar, DFC (21 August 1894 -- 25 December 1919) was a Canadian World War I two-seater flying ace who, in conjunction with his gunners, was credited with 31 victories.
Answer : World War I
Output:
Which historic war did Andrew Edward McKeever participate?