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

Ex Input:
Which film was based on the story The Sentinel by Arthur C Clarke?

Ex Output:
arthur c. clarke


Ex Input:
Who had hits with Stepping Out and Different For Girls?

Ex Output:
different for girls


Ex Input:
Which band released the single All the Small Things in 2000?

Ex Output:

all the small things