Definition: 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.
Input: Sentence1: Jim's son Joe is a great guitar player. Sentence2: Joe has been playing the guitar for Years. Sentence3: Joe has been asked to join a band. Sentence4: Jim goes to see his son play in the band. Sentence5: He is proud of how good his son is at playing guitar.
Output:
A band, Jim, Joe