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 popular animated characters, first seen in 1996 include many different characters including ones called Ash Ketchum, Tracy Sketchit and Gar Oak?

SOLUTION: tracy

PROBLEM: On which island is Nassau, the capital of the Bahamas?

SOLUTION: nassau

PROBLEM: Which South American country which has had currencies the Cruzeiro and the Cruzado, now uses the Real?

SOLUTION:
brazilian cruzeiro