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.

Q: Context : In 1994, the U.S. military officially accepted the XM4 into service as the M4 carbine to replace M16A2s in certain roles. 
Answer : 1994

A: In which year was the service entry date for M4 carbine?
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Q: Context : The 64th Venice International Film Festival, held in Venice, Italy, opened on August 29, 2007, with Joe Wright's Atonement and closed September 8, 2007. 
Answer : 2007

A: When did 64th Venice International Film Festival occurr?
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Q: Context : Willard Warner (September 4, 1826 -- November 23, 1906) was a brevet brigadier general in the Union Army during the American Civil War. 
Answer : American Civil War

A:
In which war did Willard Warner fight?
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