TASK 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.
PROBLEM: Sentence1: Bobby was downloading music to his computer. Sentence2: He was downloading it from a shady site. Sentence3: Bobby began to have trouble with his computer. Sentence4: He had downloaded a virus. Sentence5: Bobby had to bring his computer to an expert.

SOLUTION: An expert, Bobby

PROBLEM: Sentence1: Tom was walking home. Sentence2: A small cat started following him. Sentence3: Tom thought the cat was cute. Sentence4: It followed him all the way home. Sentence5: Tom eventually took it in.

SOLUTION: Cat, Tom

PROBLEM: Sentence1: Lucas was at football practice after school. Sentence2: Coach asked Lucas and the others for their signed permission slips. Sentence3: Lucas realized he had left his permission slip at home. Sentence4: He called his older sister and asked her to bring the slip to school. Sentence5: She arrived soon after with the slip and cookies for the whole team.

SOLUTION:
Team, Sister, Coach, Lucas, Others