TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: In which classic T.V. crime series did Captain Frank Furillo appear ?

SOLUTION: frank furillo

PROBLEM: Which Chuck Berry song is performed by Marty McFly at the end of the film Back to the Future?

SOLUTION: back to the future

PROBLEM: Buenos Aires is the capital of which South American country?

SOLUTION:
buenos aires