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:
Who is the current Australian prime minister ?

Ex Output:
australia


Ex Input:
What disease caused the deaths of Freddie Mercury, Liberace, and Arthur Ashe?

Ex Output:

liberace