Premise: "A man with a striped shirt."\nHypothesis: "Blue jeans and a red kerchief in his pocket is being thrown off a brown irate horse while a brown and tan horse is buckling while the crowd is watching."\nDo we know that the hypothesis entailed by the premise?
Let's think step by step.
it is not possible to tell
The man being thrown off a horse is a professional horse rider.

.

So, the answer is it is not possible to tell