Detailed Instructions: 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.
Problem:Sentence1: John's goal was to learn how to draw well. Sentence2: He read books about perspective, shading, and anatomy. Sentence3: But whenever he practiced drawing, he was disappointed in his results. Sentence4: Eventually, he became too frustrated and never drew again. Sentence5: A year later, he thought of how much progress he could have made.
Solution:
John