Problem: Determine the topic of the question. Question: "how many albums has eminem sold in his career?" Topic:

A: Eminem

Problem: Determine the topic of the question. Question: "what causes thunder sound?" Topic:

A: Thunder

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

A: Heavy metal music

Problem: Determine the topic of the question. Question: "how much total wealth in USA?" Topic:

A:
Wealth in the United States