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.
Q: Sentence1: John loved race cars. Sentence2: One day while in town, he noticed a car show. Sentence3: John and his father admired all the racing cars in the car show. Sentence4: John was able to sit in one of the race cars. Sentence5: John said this was the best day of his life!
A:
John, Father