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: Sam's favorite color was black. Sentence2: Everyone made fun of him for it. Sentence3: This made sam cry. Sentence4: Sam's teacher told everyone to stop making fun of him. Sentence5: After that no one made fun of Sam.
A:
Sam's teacher, Everyone, Sam