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

Answer: When was Hungen station opened?

Question: Context : Blind Guys (Hungarian: Vakvaganyok) is a 2001 Hungarian drama film directed by Peter Timar.
Answer : Peter Timar

Answer: Who served as director for Blind Guys?

Question: Context : Max Matern was a communist storm trooper who was convicted of murder and executed for his involvement in the assassinations of Police Captains Paul Anlauf and Franz Lenck.
Answer : murder

Answer:
For what crime was Max Matern prosecuted?