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.

Q: Context : PyGTK is a set of Python wrappers for the GTK+ graphical user interface library. 
Subject : PyGTK 
Relation : based on

A: The PyGTK is based upon what?
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Q: Context : In 1961, the first M79 grenade launchers were delivered to the US Army. 
Subject : M79 grenade launcher 
Relation : service entry

A: Which was the official year for the approval of M79 grenade launcher?
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Q: Context : The Power of the Daleks is the completely missing third serial of the fourth season in the British science fiction television series Doctor Who, which was first broadcast in six weekly parts from 5 November to 10 December 1966. 
Subject : The Power of the Daleks 
Relation : series

A:
What is the series that The Power of the Daleks is a part of?
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