instruction:
Given an trivia question precisely answer the question with a word/phrase/name. External resources such as Wikipedia could be used to obtain the facts.
question:
Matt Damon played which role in a trilogy of films about an amnesiac who also suffers from PTSD who is attempting to discover his true identity amidst a clandestine conspiracy within the CIA to track him down and arrest or kill him?
answer:
jason bourne

question:
The composer Frdric Chopin had a decade-long affair with which French author?
answer:
george sand

question:
To which genus of trees does the Maple belong?
answer:
acer