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: Patrick wanted to earn money for a toy gun. Sentence2: He asked his mom for money. Sentence3: His mom told him to clean his room. Sentence4: Patrick went in his room and shoved all his toys under his bed. Sentence5: Patrick's mom gave him some money when she saw a clean room.
Output:
Patrick, Mom