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

Ex Input:
Which English comedian has joined Amanda Holden as one of the judges on the current series of 'Britain's Got Talent'?

Ex Output:
britain's got talent


Ex Input:
What book was written by Alexandre Dumas about Edmond Dantes' imprisonment in the Chateau d'If?

Ex Output:
alexandre dumas


Ex Input:
Vodka and orange makes up what cocktail?

Ex Output:

cocktail