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

[Q]: In which town in California is Disneyland?
[A]: disneyland

[Q]: Which hero of science fiction was created by Alex Raymond?
[A]: alex raymond

[Q]: Which river with a vast delta to the South china Sea rises as the Za Qu in Tibet?
[A]:
china