Premise & hypothesis.
A person wearing a cowboy hat, jeans, and a black shirt is riding a brown horse in a barrel racing arena.

a person is riding a brown horse and winning a barrel racing competition
++++++++++
true or not.
it is not possible to tell

Premise & hypothesis.
A teenager with a purple bandanna around his neck plays the electric guitar and screams into a microphone.

The teenager is also playing the drums.
++++++++++
true or not.
no

Premise & hypothesis.
A woman in a black bikini jumps into the water.

woman jumps in water
++++++++++
true or not.
yes