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 hero of science fiction was created by Alex Raymond?

SOLUTION: alex raymond

PROBLEM: What sport features in the films `He Got Game` (1998), `Flubber` (1997) and `Celtic Pride` (1996)?

SOLUTION: celtic pride

PROBLEM: The Ebro is the second largest river in which country?

SOLUTION:
ebro