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

Ex Input:
Which 1995 'Space' move starred Tom Hanks; Bill Paxton and Kevin Bacon?

Ex Output:
tom hanks


Ex Input:
Which two brothers had hits with Cathy's Clown and Wake Up Little Susie?

Ex Output:
cathy's clown


Ex Input:
Which of the core cast of the TV series Friends also appeared in the 2000 film The Whole Nine Yards with Bruce Willis?

Ex Output:

friends