Definition: 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: Amy's crush Ray had begun to ignore her. Sentence2: She had been ignoring him first, but this was unexpected. Sentence3: She walked home slowly reveling in her pain. Sentence4: Amy's mother tried to get her to talk, but Amy refused. Sentence5: Her mother felt helpless as her daughter dragged herself to her room.
Output:
Amy, Amy's mother, Ray