Q: 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: Carol went to the concert with her friend Amethyst. Sentence2: They snuck backstage together to get a look at Jack White. Sentence3: Jack White screamed and flung his guitar against the wall. Sentence4: It shattered into a million pieces. Sentence5: Amethyst picked up a piece and together the two girls ran away.
A:
Carol, Jack white, Amethyst