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.

[EX Q]: Context : Fritz X was a nickname used both by Allied and Luftwaffe personnel. 
Subject : Fritz X 
Relation : service entry
[EX A]: What year did Fritz X come into use?

[EX Q]: Context : The Mysteron weaknesses discovered in ``Operation Time'' are developed in ``Spectrum Strikes Back'', its sequel episode. 
Subject : Operation Time 
Relation : series
[EX A]: What series is Operation Time from?

[EX Q]: Context : William Price Williamson (August 1884 -- 17 August 1918) was an officer in the United States Navy. 
Subject : William Price Williamson 
Relation : military branch
[EX A]:
What military branch was William Price Williamson in?