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.

Context : The Curse of Naar is the twentieth book in the award-winning Lone Wolf book series created by Joe Dever. 
Answer : Lone Wolf
Which series is The Curse of Naar apart of?

Context : Anne Matthes (born 30 April 1985) is a retired German female volleyball player. 
Answer : female
What was the gender of Anne Matthes?

Context : Otto Sydow (1 February 1896 -- 24 June 1970) was a highly decorated Generalmajor in the Luftwaffe during World War II. He was also a recipient of the Knight's Cross of the Iron Cross. 
Answer : Luftwaffe

What military organization did Otto Sydow belong to?