Problem: Determine the topic of the question. Question: "how does sedimentary rock form?" Topic:

A: Sedimentary rock

Problem: Determine the topic of the question. Question: "what is section eight housing?" Topic:

A: Section 8 (housing)

Problem: Determine the topic of the question. Question: "who does chris humphries play for?" Topic:

A: Kris Humphries

Problem: Determine the topic of the question. Question: "what is vitamin b12 used for?" Topic:

A:
Vitamin B12