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: Marlin was a very lonely man. Sentence2: He was looking for love his whole life. Sentence3: One day he was sitting at a park bench. Sentence4: A young lady sits down beside him. Sentence5: The two talk for hours and become the best of friends.
Output:
A young lady, Friends, Marlin