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

Ex Input:
Aaron Copeland wrote a ballet about which American folk hero?

Ex Output:
aaron copeland


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

Ex Output:
macon


Ex Input:
Who writes the scripts for the TV series Downton Abbey?

Ex Output:

downton abbey