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

Ex Input:
Who was re-elected Prime Minister of Canada in May 2011?

Ex Output:
prime minister of canada


Ex Input:
Which country is currently ruled by the Chakri dynasty that has been in power since 1782?

Ex Output:
chakri dynasty


Ex Input:
Who wrote the play 'Barefoot in the Park', which premiered on Broadway in 1963?

Ex Output:

barefoot in the park