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

[Q]: Which American city has baseball-playing 'Dodgers'?
[A]: los angeles dodgers


[Q]: On which date do we celebrate 'Boxing Day'?
[A]: boxing day


[Q]: Christopher Columbus was born in 1451 in which city and former Republic?
[A]:
christopher columbus