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: Carl's parents bought him an expensive car when he got his license. Sentence2: Carl was careless and drove too fast. Sentence3: Within a week of getting his new car, Carl wrecked it. Sentence4: Carl's parents bought him another new car. Sentence5: Carl's parents were just as irresponsible as Carl was.
A:
Carl's parents, Carl