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: The family was on a boat. Sentence2: They were going on a dolphin cruise. Sentence3: As soon as they took off, they saw several of them! Sentence4: The dolphins chased them and jumped out of the water. Sentence5: They took lots of pictures of the animals.
Output:
The family, Dolphins