Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.

[EX Q]: Which film was based on the story The Sentinel by Arthur C Clarke?
[EX A]: arthur c. clarke

[EX Q]: Which is the largest continent on Earth?
[EX A]: earth

[EX Q]: The Disney Brothers Cartoon Studio was set up on October 16 1923 by Walt Disney and his brother, what was his brothers' first name?
[EX A]:
walt disney