Determine the topic of the question. Question: "when does black friday start for christmas?" Topic:
Ans: Black Friday (shopping)

Determine the topic of the question. Question: "who sang that song-a change is going to come?" Topic:
Ans: A Change Is Gonna Come

Determine the topic of the question. Question: "who killed general warren in bunker hill?" Topic:
Ans: Joseph Warren

Determine the topic of the question. Question: "what is the source of geothermal energy?" Topic:
Ans: Geothermal energy