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 was sixteen years old. Sentence2: He wanted nothing more than to pass his driving test. Sentence3: So Johnny's mother bought him book to help him study for the test. Sentence4: Unfortunately, Johnny never took the time to read it. Sentence5: When he finally took the test, Johnny failed.
Solution:
Johnny, Mother