Premise: "A jockey is perched atop a brown horse as people mill about behind them."
Hypothesis: "The horse and rider are getting ready for a race."
Do we know that the hypothesis entailed by the premise? Stream of thoughts:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Just because a jockey is atop a horse doesn't mean it is getting ready for a race.
Therefore, the answer is it is not possible to tell.