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.
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Question: 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.

Answer: I (myself), Princess, Receptionist, Boston terrier, Dog

Question: Sentence1: Susan met a nice prince on the Internet. Sentence2: She wanted to help him claim his fortune. Sentence3: Susan had to keep scraping together money for her sweet prince. Sentence4: Sadly, she lost touch with him when she went broke. Sentence5: Susan still hopes her prince will find her again someday.

Answer: Prince, Susan

Question: Sentence1: Jon wanted to know more about birds, so he went to the library. Sentence2: While at the library, he saw an attractive librarian. Sentence3: He slowly got up the nerve to talk to the librarian, and asked her out Sentence4: The librarian told him no. Sentence5: Jon ran out of the library and never went there again.

Answer:
Librarian, Birds, Jon