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: 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!
[A]: Jacob, Vet, Dog

[Q]: Sentence1: Tim had been trying to have a child with his wife for years. Sentence2: It was with great pride that he was now holding his newborn son. Sentence3: At the hospital, Tim could not help but grin. Sentence4: The nurses and doctors noticed this as well. Sentence5: Tim left the hospital, a changed man.
[A]: Nurses, Tim, Doctors, Newborn son, Wife

[Q]: Sentence1: Jen adored nailpolish. Sentence2: She got a lot of it for her birthday as well. Sentence3: One day, she realized she had no more nail polish. Sentence4: She quickly went to the salon and purchased more nail polish. Sentence5: Now she has a lot of nail polish again.
[A]:
Jen