input question: Determine the topic of the question. Question: "what are add ons?" Topic:???
output answer: Add-on

Determine the topic of the question. Question: "what are some chinese inventions?" Topic:
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Answer: List of Chinese inventions

Q: Determine the topic of the question. Question: "who wrote white christmas?" Topic:
A: White Christmas (song)

Question: Determine the topic of the question. Question: "what are rocker arms??" Topic:
Answer: Rocker arm

[Q]: Determine the topic of the question. Question: "who makes blackberry?" Topic:
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[A]: BlackBerry

Problem: Given the question: Determine the topic of the question. Question: "what is in the preamble of the constitution?" Topic:
++++++++++++++++++++++++++++++++
The answer is:
Preamble to the United States Constitution