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: Jeff is addicted to working out and he goes everyday. Sentence2: He just started a new job that has him working long hours. Sentence3: These long hours prevent him from being able to go to the gym. Sentence4: By the time Jeff gets off work the gym is closed. Sentence5: Jeff went out and bought all the stuff he needs to work out athome.

SOLUTION: Jeff

PROBLEM: Sentence1: Marie was stuck in traffic and playing a game on her phone. Sentence2: Someone tapped on her window and she recognized a cop. Sentence3: He told her to stop playing and pay attention. Sentence4: She apologized and pocketed her phone. Sentence5: She regretted it as it took an hour for the traffic to move again.

SOLUTION: Cop, Marie

PROBLEM: Sentence1: Jen walked out of the mall only to find her car was gone. Sentence2: She looked around frantically. Sentence3: Finally she called mall security. Sentence4: As they started questioning her she realized her car wasn't missing. Sentence5: She had gone out of the wrong door of the mall.

SOLUTION:
Jen, Mall security