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

Example input: Who was the first American President?
Example output: president of the united states
Example explanation: The question talks about the president of the USA.
Q: What is the name of the paranoid android in the novel 'The Hitchhiker's Guide to the Galaxy' by Douglas Adams?
A:
the hitchhiker's guide to the galaxy