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: The group got together in front of the ice skating ring. Sentence2: When we tried to open the front door, it wouldn't open. Sentence3: The janitor told us that the place is closed for today. Sentence4: However, Pedro proposed that we should get something to eat. Sentence5: Therefore, I drove everyone to a nearby restaurant.

SOLUTION: I (myself), Janitor, Pedro, The group

PROBLEM: Sentence1: The Greens live in Atlanta. Sentence2: Last week, they traveled to Canada. Sentence3: There was a lot of snow and ice. Sentence4: Wind chills were well below zero. Sentence5: The Greens are happy to be back in warm Atlanta!

SOLUTION: Greens

PROBLEM: Sentence1: The selfish man clambered through the mud. Sentence2: This was madness, he wasn't a hero. Sentence3: As he struggled for the door handle he knew he was ruining his suit. Sentence4: He pulled the injured woman from the car, worried about a lawsuit. Sentence5: Everyone afterward praised the selfish man.

SOLUTION:
Injured woman, Selfish man