TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Aaron Copeland wrote a ballet about which American folk hero?

SOLUTION: aaron copeland

PROBLEM: Which legal drama starring Martin Shaw ran for six series on BBC TV from 2001?

SOLUTION: martin shaw

PROBLEM: Name the French artist (1839-1906) whose painting 'The Card Players' is one of the most expensive ever sold?

SOLUTION:
the card players