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.
Q: Sentence1: Sandy was asked to water her friend's plants. Sentence2: The friends were going out of town for a couple of weeks. Sentence3: Sandy was very forgetful. Sentence4: She forgot to water any of the plants. Sentence5: Most of them died.
A:
Plants, Friends, Her friend, Sandy