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: I have a daughter who loves to jump. Sentence2: She enjoys trampolines and bouncy houses. Sentence3: She has wanted to go to SkyZone for a long time. Sentence4: Sky Zone is pretty expensive, so she hasn't been able to go. Sentence5: Her friend is having a party at SkyZone and she is thrilled!
I (myself), Daughter, Friend

Sentence1: Greta had noticed her son was having trouble focusing in school. Sentence2: Greta took her son to the doctor. Sentence3: The doctor diagnosed the boy with ADHD. Sentence4: The doctor prescribed medicine for him. Sentence5: Greta's son now focuses much better in class.
Greta, Greta's son, The doctor

Sentence1: Alex owned a lot of money to a loan shark. Sentence2: He was desperate to make money as fast as he could to repay the loan. Sentence3: He went to the casino and gambled everything he had left. Sentence4: In a lucky strike, he quadrupled his earnings. Sentence5: He then paid the loan shark and swore to never borrow money again.
Alex