Based on the given question and tppic, give an answer. The answer is available on on the internet. The questions are mostly centered around a single named entity.

Q: concept: Lena River  question:  where does lena river begin and end?

A: ['Baikal Mountains']
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Q: concept: Pittsburgh Steelers  question:  what is the name of the pittsburgh steelers head coach?

A: ['Mike Tomlin']
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Q: concept: Oakland County  question:  what cities are in oakland county michigan?

A:
['Metro Detroit']
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