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

Ex Input:
The most northerly part of mainland Australia is in which state?

Ex Output:
australia


Ex Input:
Which four letter word beginning with 'F' is a white crumbly Greek cheese, made from sheep's or goats milk and cured in brine?

Ex Output:
sheep


Ex Input:
Lucie Manette married Charles Darnay in which Dickens novel?

Ex Output:

charles darnay