TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Feb 15, 1564 saw the birth of what famed Italian physicist, mathematician, astronomer, and philosopher, who discovered the first 4 moons of Jupiter?

SOLUTION: astronomer

PROBLEM: What American swimmer won eight gold medals at the 2008 Olympics?

SOLUTION: 2008 summer olympics

PROBLEM: Who played the title role in the 1955 film 'Davy Crockett, King Of The Wild Frontier'?

SOLUTION:
davy crockett