Teacher: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.
Teacher: Now, understand the problem? Solve this instance: Sentence1: Jack is in first grade. Sentence2: He has worked hard all year to keep his grades up. Sentence3: His final report card was sent home today. Sentence4: He received all A's. Sentence5: As a reward his mother took him for ice cream.
Student:
Jack's mother, Jack