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

[Q]: In which war was the Battle of Bunker Hill?
[A]: battle of bunker hill


[Q]: In which Shakespeare play do the characters Ajax, Achilles and Ulysses appear?
[A]: achilles


[Q]: Which legendary World Champion Boxer dropped his surname of Barrow to box under his two Christian names?
[A]:
boxing