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 : Since its launch in 2004, Avalon Waterways has christened 18 new ships in Europe.
Subject : Avalon Waterways
Relation : parent company

A: What is Avalon Waterways's parent company?
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Q: Context : Desert Combat (DC) is a mod for the first-person shooter (FPS) computer game Battlefield 1942, created by Trauma Studios.
Subject : Desert Combat
Relation : based on

A: Which is the basis of Desert Combat?
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Q: Context : That Hideous Strength (subtitled A Modern Fairy-Tale for Grown-Ups) is a 1945 novel by C. S. Lewis, the final book in Lewis's theological science fiction Space Trilogy.
Subject : That Hideous Strength
Relation : series

A:
To which series does That Hideous Strength belong?
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