Detailed 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.
Problem:Sentence1: Johnny used to watch boxing on TV with his uncle. Sentence2: He dreamed of being champion and getting out of their neighborhood. Sentence3: His uncle asked Johnny's mom if he could sign him up for boxing. Sentence4: Though she was scared for his safety, she agreed. Sentence5: Johnny was soon the best fighter at the gym, on his way to a career.
Solution:
Johnny's mom, Uncle, Johnny