Problem: Given the question: Determine the topic of the question. Question: "what is puerto rico currency?" Topic:
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The answer is:
Currencies of Puerto Rico

Problem: Given the question: Determine the topic of the question. Question: "where were the Winter Olympics in 2006?" Topic:
++++++++++++++++++++++++++++++++
The answer is:
2006 Winter Olympics

Problem: Given the question: Determine the topic of the question. Question: "what is busiest airport in US?" Topic:
++++++++++++++++++++++++++++++++
The answer is:
List of the busiest airports in the United States