TASK 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.
PROBLEM: Context : The Duke of Wellington's Regiment (West Riding) was a line infantry regiment of the British Army, forming part of the King's Division. 
Subject : Duke of Wellington's Regiment 
Relation : military branch

SOLUTION: What branch was Duke of Wellington's Regiment part of?

PROBLEM: Context : Island at War is a British television series that tells the story of the German occupation of the Channel Islands. 
Subject : Island at War 
Relation : narrative location

SOLUTION: Which place does Island at War exist in?

PROBLEM: Context : Power Rangers S.P.D. is an American television series and the thirteenth season of the Power Rangers franchise, based on the Super Sentai series, Tokusou Sentai Dekaranger. 
Subject : Power Rangers S.P.D. 
Relation : based on

SOLUTION:
The Power Rangers S.P.D. is based upon what?