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.

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.
Someone, Tom

Sentence1: Galen's father loved sailboats. Sentence2: Galen never had time to learn to sail. Sentence3: One day, he decided that he wanted to try it out. Sentence4: Galen asked his father to teach him to sail. Sentence5: He now has a new favorite hobby.
Galen, Father

Sentence1: Amy wanted to become a vegetarian. Sentence2: She didn't really eat much meat anyway. Sentence3: But she loved certain meat, and didn't want to give it up. Sentence4: That night her mother made lobster tails. Sentence5: Amy decided to postpone her vegetarian dreams until after the lobster.
Amy, Amy's mother