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

[Q]: The Battle of Antietam was fought during which war?
[A]: battle of antietam

[Q]: Feb 15, 1564 saw the birth of what famed Italian physicist, mathematician, astronomer, and philosopher, who discovered the first 4 moons of Jupiter?
[A]: astronomer

[Q]: The British sportswoman Charlotte Cooper, born in 1870, was famous in which sport?
[A]:
charlotte cooper