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: Ken hated going to church with his family. Sentence2: He thought it was boring and pointless. Sentence3: One Sunday he was finally allowed to stay home. Sentence4: Ken had a lot of fun watching tv and playing video games. Sentence5: He started skipping church a lot more.
Output:
Ken, His family