Given the sentence "A man in a red plaid shirt is riding a horse in rodeo show." is it true that "The man is horse riding to win a prize."?

it is not possible to tell
Explanation: The man in the red plaid shirt doesn't necessarily need to be riding for a prize just because he's on a horse in a rodeo show..

Given the sentence "A big park festival outside." is it true that "A small tea party is happening in the garden."?

no
Explanation: A park festival and a tea party are different. One is small and one is large..

Premise: "A biker wearing a yellow shirt pulls of an incredible trick in the air."
Hypothesis: "A biker doing tricks he never did before."
Do we know that the hypothesis entailed by the premise?

it is not possible to tell
Explanation: Just because a biker pulls of an incredible trick doesn't imply he never did before..

Given the sentence "A dog jumps to catch an orange frisbee." is it true that "A dog is chasing a cat."?
no
Explanation: A dog cannot catch a Frisbee and be chasing a cat at the same time..