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: John went to the horse races last weekend. Sentence2: He decided to bet on them. Sentence3: He started winning and bet even more. Sentence4: Eventually he lost everything he had won. Sentence5: He considered it breaking even and went home.

Answer: John

Question: Sentence1: Jacob noticed his dog was whining. Sentence2: Jacob investigated and found his dog's leg hurt. Sentence3: He took the dog to see the vet. Sentence4: The vet made a cast to set the hurt leg. Sentence5: Within a few weeks, Jacob and his dog were playing again!

Answer: Jacob, Vet, Dog

Question: Sentence1: Sherrie wanted to go to the beach. Sentence2: She did not own a car. Sentence3: Sop she called a friend to ask if they wanted to go. Sentence4: The friend agreed to drive her to the beach. Sentence5: They had a fun time playing in the water at the beach.

Answer:
Friend, Sherrie