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.

[EX Q]: Sentence1: Every Saturday night my friends go bowling. Sentence2: Last week they invited me. Sentence3: I was so excited to go bowling with them. Sentence4: When we went bowling I did not do very well. Sentence5: Even though I didn't bowl well I had a lot of fun with my friends.
[EX A]: I (myself), Friends

[EX Q]: Sentence1: Lucy sat at the police station. Sentence2: She'd been lost and a kind stranger brought her here. Sentence3: She sat with puffy swollen tear stained eyes waiting on her grandpa. Sentence4: An officer gave her a soda while she waited. Sentence5: She was so happy to see grandpa when he arrived, she knocked it over.
[EX A]: Grandpa, Lucy, Kind stranger, Officer

[EX Q]: Sentence1: My nephew warned the doctors he is a carrier of Factor V Leiden. Sentence2: The doctors need to know in case his daughter carries the gene. Sentence3: Even though the doctors were fully warned about this. Sentence4: They put my niece through a bad labor instead of doing a c section. Sentence5: Two days after my beautiful niece was born, she had a stroke.
[EX A]:
His daughter, Nephew, Niece, Doctors