In this task, you're given a story (which contains five sentences only). Your task is to find all the characters which are available in the given story.
Q: Sentence1: Chris often drove above the speed limit. Sentence2: He found himself getting to work a lot faster. Sentence3: His parents warned him about getting speeding tickets. Sentence4: Chris continued to drive above the speed limit on his way to work. Sentence5: Chris was pulled over by an officer and got a speeding ticket.
A:
Chris, Chris' parents, Officer