Instructions: 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.
Input: Sentence1: Sarah always wanted a cat. Sentence2: She asked her parents for a cat. Sentence3: They told her they'd think about it. Sentence4: The decided to surprise her and got her a cat. Sentence5: She came home from school and happily found the cat.
Output:
Sarah, Parents, Cat