Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.

[Q]: Alexander the Great died in which ancient city?
[A]: alexander the great


[Q]: On November 22, 1986, which boxer became the youngest WBC Heavyweight champion, at age 20 years, 4 months, when he scored a TKO over Trevor Berbick in the second round?
[A]: boxing


[Q]: Dec 13, 1953 saw the birth of Ben Bernanke, Harvard grad with a PhD from MIT. What governmental position does he hold?
[A]:
ben bernanke