In this task, You are given an open-domain question that can be answered based on factual information. Your task is to provide \*short\* answer (in a few words only) for the given question. The short answer can be one or more entities or it can also be boolean \*yes\* or \*no\*.

Q: who developed a useful staining method to identify bacteria

A: Hans Christian Gram
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Q: why do you put fork marks on peanut butter cookies

A: convenience
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Q: when did the f14 go out of service

A:
2006
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