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

[EX Q]: What is the official language of the Dominican Republic?
[EX A]: dominican republic

[EX Q]: In which film did Sharon Stone play the character 'Catherine Tramell?
[EX A]: catherine tramell

[EX Q]: Which city will host the 2004 Summer Olympics?
[EX A]:
2004 summer olympics