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.

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!
Greens

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.
Extras, Friends, Shelly

Sentence1: Nancy was bothered by her friends all day. Sentence2: They keep reminding her that her boyfriend cheated on her. Sentence3: On the other hand, her boyfriend told her that he didn't. Sentence4: Since she trust her boyfriend, she wasn't worried at all. Sentence5: However, she saw her boyfriend with another girl the next day.
Another girl, Friends, Nancy, Boyfriend