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.
Q: Sentence1: Tom had purchased his wife a Porsche 911. Sentence2: He had purchased his son a new Corvette. Sentence3: They had both cars at an abandoned airfield in Kansas. Sentence4: Tom and his wife raced the cars on the landing strip. Sentence5: The Corvette started faster, but the Porsche reached 161 mph.
A:
Tom's wife, Tom's son, Tom