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 : Rudolf Gerhardt (26 March 1896 -- 10 November 1964) was a highly decorated Oberst in the Wehrmacht during World War II. He was also a recipient of the Knight's Cross of the Iron Cross. 
Answer : Knight's Cross of the Iron Cross
What award was received by Rudolf Gerhardt?

Context : Walter Grabmann (20 September 1905 -- 20 August 1992) was a German World War II Luftwaffe Generalmajor. 
Answer : World War II
In which war did Walter Grabmann participate?

Context : Apache Forrest is a web-publishing framework based on Apache Cocoon. 
Answer : Apache Cocoon

The Apache Forrest is based upon what?