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

Ex Input:
Lexus is the luxury vehicle division of what car maker?

Ex Output:
lexus

Ex Input:
Where is the Barbary Coast?

Ex Output:
barbary coast

Ex Input:
Under what pseudonym did JK Rowling publish the book 'The Cuckoo's Calling'?

Ex Output:
the cuckoo's calling