Detailed Instructions: 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.
Problem:Sentence1: Tina lost her dog. Sentence2: She lost him in the woods. Sentence3: She kept calling for it. Sentence4: But she couldn't find it. Sentence5: Finally her neighbor bought it back.
Solution:
Neighbor, Dog, Tina