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

Ex Input:
Who directed the film Black Swan (in ballet)?

Ex Output:
black swan


Ex Input:
The French wine growing areas of Macon, Beaujolais and Chablis are in which region?

Ex Output:
macon


Ex Input:
Who played Richard III in the first series of the UK television show 'Blackadder'?

Ex Output:

blackadder