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

Example Input: From which musical did the song 'Chim Chim Cheree' come?
Example Output: chim chim cher-ee

Example Input: 'Highway 61 Revisited' and 'Blood On The Tracks' were both albums released by which popular singer?
Example Output: highway 61 revisited

Example Input: What ocean borders the US state of California?
Example Output:
california