Given the task definition and input, reply with output. 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.

Sentence1: The Omaha zoo was getting new elephants in their zoo. Sentence2: The family drove one hour to go to see the elephants. Sentence3: Once they got their they had to walk to the back of the zoo. Sentence4: One of the elephants was hiding behind the feeding shed. Sentence5: The other four elephants were out and enjoying the sun and visitors.
Family, Elephants