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: Margaret was walking through town. Sentence2: She noticed a store window with an ad for a family shelter. Sentence3: The pictures of kids really struck a chord in her heart. Sentence4: She decided to donate. Sentence5: She walked inside and began the process.
Output:
Margaret, Kids