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.
Input: Sentence1: Nathan threw a quarter into a well. Sentence2: He wished for peace and tranquility. Sentence3: When we woke up the next day, he saw his divorced parents. Sentence4: They were talking about getting back together. Sentence5: Nathan was excited to hear.
Output:
Parents, Nathan