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 sink in my bathroom broke. Sentence2: I decided that I should fix it myself. Sentence3: After one hour, the sink looked worse than before. Sentence4: I finally decided to call a professional plumber. Sentence5: The plumber fixed the sink in ten minutes.

SOLUTION: I (myself), Professional plumber

PROBLEM: Sentence1: Shelly wanted to make a music video for his new song. Sentence2: He got some friends together and hired a host of extras. Sentence3: They danced on cars that they parked in a city. Sentence4: The video was a moderate success. Sentence5: Shelly saw a slight bump in downloads of his song.

SOLUTION: Extras, Friends, Shelly

PROBLEM: Sentence1: Max and Linda are boyfriend and girlfriend. Sentence2: Max loves Linda! Sentence3: Linda does not feel the same about Max. Sentence4: Linda broke up with Max. Sentence5: Max is heartbroken.

SOLUTION:
Max, Linda