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: Joan was invited to the Smiths' for dinner. Sentence2: She brought an expensive bottle of wine to impress them. Sentence3: David Smith drank most of it and became rather violent. Sentence4: Mary Smith explained that her husband was a recovering alcoholic. Sentence5: Joan vowed never to visit with them again.
Solution:
Joan, Mary smith, David