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 : Gelnhausen railway (Hungen--Gießen) was opened on 29 December 1869 and Hungen station went into operation. 
Answer : 29 December 1869
When was Hungen station opened?

Context : The Bugs Bunny/Road Runner Movie, originally released under the title The Great American Chase, is a 1979 Looney Tunes film with a compilation of classic Warner Bros. cartoon shorts and newly animated bridging sequences, hosted by Bugs Bunny. 
Answer : Warner Bros.
What production company was involved in The Bugs Bunny/Road Runner Movie?

Context : Hans-Joachim Schibau (17 November 1915 -- 22 July 1985) was a highly decorated Major im Generalstab in the Luftwaffe during World War II, and a recipient of the Knight's Cross of the Iron Cross. 
Answer : Luftwaffe

To which branch did Hans-Joachim Schibau belong?