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

Ex Input:
Which actress played Arwen in the trilogy of films?

Ex Output:
arwen


Ex Input:
Which cyclist won the first medal for Team GB at the 2012 Olympic Games?

Ex Output:
gb


Ex Input:
Which boyband had a top 10 hit in 1995 with Back for Good?

Ex Output:

boy band