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: Jamin always thought he was a good driver. Sentence2: However, he was not a very safe driver. Sentence3: He was always driving over the speed limit. Sentence4: He was pulled over by a policeman for going over the speed limit. Sentence5: Now, he always drives the speed limit.
A:
Jamin, Policeman