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

Ex Input:
Which TV character has sisters called Daisy and Rose?

Ex Output:
daisy

Ex Input:
In which Shakespeare play do the characters Ajax, Achilles and Ulysses appear?

Ex Output:
achilles

Ex Input:
Which moorland plateau is the highest point in Derbyshire?

Ex Output:
derbyshire