Detailed 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.
Problem:Sentence1: Luis had a present from a year earlier. Sentence2: It was from his mom. Sentence3: He refused to open it because he wanted her to see him open it. Sentence4: A few days later she stopped by. Sentence5: They were reunited and he finally opened the present.
Solution:
Luis, Mom