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: Mary and Julia needed to get away. Sentence2: Work had been stressful and things kept piling on. Sentence3: They booked a room in a nearby city. Sentence4: They visited the zoo, ate at a fancy restaurant, and shopped. Sentence5: After the weekend they felt refreshed.
Output:
Mary, Julia