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.

Example Input: 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.
Example Output: Hank, The group, The audience

Example Input: Sentence1: John and Amy were playing tag with some friends. Sentence2: John tagged Amy and she took off running. Sentence3: She ran fast, but not fast enough. Sentence4: Soon the others caught up to her. Sentence5: Now it was time for Amy to chase everyone!
Example Output: Amy, Everyone, John, Friends

Example Input: Sentence1: Joan was a realtor. Sentence2: She always lived in an apartment, herself. Sentence3: She grew tired of finding houses for other people. Sentence4: One day, she decided to buy a house! Sentence5: Joan finally had a home of her own.
Example Output:
Joan, People