Definition: You will be given a context, a subject and a relation. Your task is to generate a question based on the subject and relation. The generated question should include the given subject. Try to use a minimum number of words that are not present in either context, subject or relation while generating question.
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.
Subject : Andrew Edward McKeever
Relation : conflict
Output:
Which historic war did Andrew Edward McKeever participate?