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: Maria's child was walking on the sidewalk. Sentence2: Her shadow followed her. Sentence3: She noticed the shadow and started to cry. Sentence4: Maria ran to pick her up. Sentence5: The shadow vanished.
Output:
Her shadow, Maria, Maria's child