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: Jack and Jill went out on their dock. Sentence2: They were going fishing. Sentence3: Jack tripped and fell into the water. Sentence4: Jill dove in after him. Sentence5: Jill saved Jack's life.
Solution:
Jill, Jack