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.

Example Input: Context : In May 2011 Metismo was acquired by Software AG for an undisclosed amount. 
Answer : Software AG
Example Output: What company is Metismo part of?

Example Input: Context : Herbert Schwender (22 December 1912 -- 22 September 1944) was a highly decorated oberst in the Wehrmacht during World War II, and one of only 882 recipients of the Knight's Cross of the Iron Cross with Oak Leaves. 
Answer : World War II
Example Output: In which war/battle did Herbert Schwender fight?

Example Input: Context : Works No. 174 started a modernization programme for the ZSU-57-2 in parallel with the beginning of its serial production in 1957, but this programme was rejected due to the development of new radar-guided SPAAGs armed with small-bore autocannons and another tracked chassis. 
Answer : 1957
Example Output:
What was the year ZSU-57-2 entered service?