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: One day Joe took a day trip to New York City. Sentence2: First he went to the Empire State Building. Sentence3: Then he went to the 9/11 memorial. Sentence4: Finally he went to the Statue of Liberty. Sentence5: He had a great time.
Joe