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.
--------
Question: Sentence1: I have never been hunting before. Sentence2: I would not even know where to begin. Sentence3: I would like to go one day. Sentence4: It would be fun to come back with a win. Sentence5: Perhaps I will go next season.

Answer: I (myself)

Question: Sentence1: Debra was looking for her cat. Sentence2: Sam said she'd help her. Sentence3: The cat was on a tree. Sentence4: Sam climbed up the tree but fell. Sentence5: The cat jumped down the tree.

Answer: Her cat, Sam, Debra

Question: Sentence1: Tom was in the shower. Sentence2: He heard someone knocking at the door. Sentence3: He rushed to the door. Sentence4: He only had a small towel. Sentence5: He was embarrassed but answered the door.

Answer:
Someone, Tom