input question: Determine the topic of the question. Question: "what is muse's lead singer's name?" Topic:???
output answer: Muse (band)

Determine the topic of the question. Question: "what is tmz stand for?" Topic:
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Answer: TMZ (website)

Q: Determine the topic of the question. Question: "what is metal music about?" Topic:
A: Heavy metal music

Question: Determine the topic of the question. Question: "how does a dredge work??" Topic:
Answer: Dredging

[Q]: Determine the topic of the question. Question: "when is halley's comet next?" Topic:
****
[A]: Halley's Comet

Problem: Given the question: Determine the topic of the question. Question: "how does sedimentary rock form?" Topic:
++++++++++++++++++++++++++++++++
The answer is:
Sedimentary rock