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: Mavis turned up her music really loud. Sentence2: Her neighbors were having an argument outside. Sentence3: No matter how loud she turned up the music she could hear them. Sentence4: Mavis beat on the walls telling them to shut up. Sentence5: They told her she didn't have to be so rude.
[A]: Neighbors, Mavis

[Q]: Sentence1: Hank practiced his guitar to play in a jazz band. Sentence2: He got on stage with the group for his first performance. Sentence3: Hank was very nervous but thought he'd done well. Sentence4: He looked into the audience to see what they thought. Sentence5: They clapped in approval at what he'd played.
[A]: Hank, The group, The audience

[Q]: Sentence1: John invited Carl for a beer. Sentence2: They had a nice time. Sentence3: They drank and talk. Sentence4: When they wanted to leave, John found out he had forgotten his wallet. Sentence5: Carl had to pay for a beer.
[A]:
John, Carl