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

Ex Input:
Which poem by Keats and novel by Disraeli both have the same title?

Ex Output:
john keats


Ex Input:
Whitney Houston`s husband Bobby Brown was originally a member of which successful band?

Ex Output:
bobby brown


Ex Input:
Which song written by Cole Porter in 1933 referred to Fred Astaire, Mussolini, Mrs Sweeny and Camembert ?

Ex Output:

cole porter