TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: What is the capital of the American state of Delaware Boise, Dover or Jefferson City?

SOLUTION: delaware

PROBLEM: Who wrote `20,000 Leagues Under The Sea`?

SOLUTION: 20,000 leagues under the sea

PROBLEM: What is the most popular breed of dog in the United States?

SOLUTION:
dog