[Q]: Determine the topic of the question. Question: "when was the great fire in chicago?" Topic:
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[A]: Great Chicago Fire

[Q]: Determine the topic of the question. Question: "what are corporation balance?" Topic:
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[A]: Balance sheet

[Q]: Determine the topic of the question. Question: "when was the battle at tombstone fought?" Topic:
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[A]: Gunfight at the O.K. Corral

[Q]: Determine the topic of the question. Question: "what president made decision to buy louisiana?" Topic:
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[A]:
Louisiana Purchase