Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.

Q: Context : Tolkien fandom is an international, informal community of fans of the works of J. R. R. Tolkien, especially of the Middle-earth deplorable cultus``. 
Answer : Middle-earth

A: The Tolkien fandom is based upon what?
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Q: Context : Which Woman? is a 1918 American silent drama film directed by Tod Browning and Harry A. Pollard. 
Answer : Tod Browning

A: Who was Which Woman? was directed by?
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Q: Context : Robert Martinek (2 February 1889 -- 28 June 1944) was an artillery officer in the Austro-Hungarian Army during World War I, the Austrian Bundesheer and, during World War II, in the Wehrmacht Heer, who came to be regarded as one of the most skilled artillerymen of his generation. 
Answer : World War I

A:
What war or battle did Robert Martinek fight in?
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