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

Ex Input:
Cassandra, Grizabella and Skimbleshanks are all characters in which Andrew Lloyd Webber musical?

Ex Output:
andrew lloyd webber


Ex Input:
'Bring It All Back' was the debut single for which group in 1999?

Ex Output:
bring it all back


Ex Input:
American Buffalo and Glengarry Glen Ross are plays by which US playwright?

Ex Output:

glengarry glen ross