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: Amber was a big fan of a musical group. Sentence2: She always wanted to meet them. Sentence3: She bought a ticket to one of their concerts. Sentence4: She got backstage to meet them. Sentence5: She didn't like them after meeting them.
A:
Amber, Musical group