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

Ex Input:
What city is closest to Copacabana beach?

Ex Output:
copacabana, rio de janeiro


Ex Input:
In which city was Christopher Columbus born?

Ex Output:
columbus


Ex Input:
In which US state was the 1987 film 'The Big Easy' set?

Ex Output:

the big easy