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.
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Question: Context : Karl Emil Schäfer (17 December 1891 -- 5 June 1917) was a German pilot during World War I; he became one of the major German flying aces of the war, with 30 confirmed aerial victories. 
Answer : World War I

Answer: What was the war that Karl Emil Schäfer fought in?


Question: Context : 2 Willow Road is part of a terrace of three houses in Hampstead, London designed by architect Ernő Goldfinger and completed in 1939. 
Answer : Ernő Goldfinger

Answer: Which designer was responsible for 2 Willow Road?


Question: Context : 1st The Queen's Dragoon Guards (QDG) is a cavalry regiment of the British Army. 
Answer : British Army

Answer:
Which military branch is 1st The Queen's Dragoon Guards a part of?