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: Joe imagined getting rich by finding a priceless pearl. Sentence2: He took his boat to an oyster bed and started looking. Sentence3: He tossed the oysters aside when he found no pearls inside. Sentence4: Hours later, Joe had nothing to show for his troubles. Sentence5: His stomach grumbled and Joe thought of the wasted oysters.

SOLUTION: Joe

PROBLEM: Sentence1: Romeo thought he was the fastest kid at school. Sentence2: Romeo challenged his friend to a race on the track. Sentence3: Both of the racers lined up and prepared to take off! Sentence4: However, Romeo's foot slipped and he ended up tripping himself! Sentence5: He skinned his knee badly and was taken away to the nurse.

SOLUTION: Racers, Friend, Romeo

PROBLEM: Sentence1: Cal had newly joined a distinguished preparatory school. Sentence2: He thought he had made friends when the other boys invited him along. Sentence3: When they were in a room alone though they all beat Cal very badly. Sentence4: Sobbing, Cal asked them why. Sentence5: The boys told him it was their way of welcoming kids to the school.

SOLUTION:
Boys, School, Friends, Cal