premise: A cowboy in the rodeo arena holds on tightly as the bucking bronco tries to throw him off, while rodeo helpers and the audience look on. hypothesis: While people look on, a cowboy rides in the rodeo areno being buched by a bronco.
entailment: cowboy in the rodeo arena holds on tightly as the bucking bronco tries to throw him off implies cowboy rides in the rodeo areno being buched by a bronco.