premise: A contestant riding a pony in a rodeo setting is being thrown by the horse, while another cowboy looks on in the arena and spectators watch from behind a fence. hypothesis: A contestant riding a pony  is in a rodeo with another cowboy looking at the arena with spectators behind a fence.
entailment: The phrase "spectators watch" implies that they are watching, so "spectators behind a fence" and "spectators watch from behind a fence" mean the same thing.