You will be given a definition of a task first, then some input of the task.
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: My friend Joe has a son, 16. Sentence2: When his son was 13 he told his dad there was no summer reading. Sentence3: Joe believed his son. Sentence4: I went online and found the school did have summer reading. Sentence5: Joe told his son to do the reading, plus one book.
Output:
I (myself), Son, Joe