Problem: Given the question: Determine the topic of the question. Question: "what is a chronograph watch?" Topic:
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The answer is:
Chronograph

Problem: Given the question: Determine the topic of the question. Question: "how was color introduced in film??" Topic:
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The answer is:
Color motion picture film

Problem: Given the question: Determine the topic of the question. Question: "how many grape farms in united states?" Topic:
++++++++++++++++++++++++++++++++
The answer is:
Agriculture in the United States