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.

[Q]: Sentence1: Sam wanted to learn how to read. Sentence2: He thought his friends would mock his illiteracy. Sentence3: But when they found out, they were all very kind. Sentence4: They even volunteered to teach him his letters. Sentence5: After months of studying, Sam became a great reader!
[A]: His friends, Sam

[Q]: Sentence1: I went to the vets office with my dog Princess. Sentence2: The receptionist had a four month old Boston Terrier on her lap. Sentence3: She told me she was trying to find a home for him. Sentence4: Since Princess was the same breed and age, I could not resist. Sentence5: I left the vets office, with a brother for Princess.
[A]: I (myself), Princess, Receptionist, Boston terrier, Dog

[Q]: Sentence1: Jerry hit the baseball when the pitcher threw it to him. Sentence2: The ball went far but still remained in the field. Sentence3: I tried to run towards it. Sentence4: It bounced off my hand and landed in the ground. Sentence5: Before I returned it, the opponents scored a few points and won.
[A]:
I (myself), The pitcher, Jerry, Opponents