You will be given a definition of a task first, then some input of the task.
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: Dan's grandmother live alone in her own home. Sentence2: She became unable to take care of herself. Sentence3: Dan was given the responsibility of getting her ready to move. Sentence4: He packed up all of her things and cleaned her house. Sentence5: Dan was frustrated that other family members didn't help.
Output:
Dan, Dan's grandmother