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: Tony was tending to his farm chores one morning. Sentence2: Suddenly, he heard a commotion and saw his horse break free. Sentence3: The animal rushed down the road and off into nature. Sentence4: Tony called up some of his friends to try to wrangle the horse. Sentence5: Luckily they were able to catch him quickly.
A:
Tony, Horse, Friends