TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Which film actor (1895-1926) is known for his films The Four Horsemen, The Sheik and Blood And Sand?

SOLUTION: blood and sand

PROBLEM: Which country had a parliament called the Duma?

SOLUTION: state duma

PROBLEM: Barbara is the name of the First Lady of which US president?

SOLUTION:
barbara bush