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: I walked to my classroom. Sentence2: I was confused since no person waiting outside of the room. Sentence3: My friend eventually came. Sentence4: He told me that class was cancelled for today. Sentence5: I started to head home.

SOLUTION: I (myself), Friend

PROBLEM: Sentence1: Joshua moved to a new neighborhood. Sentence2: He had a lot of fun neighbors. Sentence3: He stood outside and drank a beer and talked to them. Sentence4: Then he drank a few more and talked longer. Sentence5: Soon he was out of beer and ready to go inside.

SOLUTION: Joshua, Neighbors

PROBLEM: Sentence1: My son, Sam, was upstairs making all types of racket. Sentence2: I was downstairs when I saw Sam jump off the balcony. Sentence3: I ran towards him and caught my beloved child in mid-air. Sentence4: I asked him why on earth would he jump off the balcony. Sentence5: Sam said that I'm always saying I would never let him fall.

SOLUTION:
My son, Earth, I (myself), Sam