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

Ex Input:
Name the town in California where Clint Eastwood was elected mayor in 1986.?

Ex Output:
clint eastwood


Ex Input:
What was the name of Chuck Berry`s 1972 hit which gave him his first number one?

Ex Output:
chuck berry


Ex Input:
Which star of the Back To The Future movies appeared in Caroline In the City?

Ex Output:

back to the future