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 capital of the US state of California?
[EX A]: california

[EX Q]: Who directed the film 'Back To The Future'?
[EX A]: back to the future

[EX Q]: Which city hosted the 1964 Summer Olympic Games?
[EX A]:
1964 summer olympics