Premise & hypothesis.
A cowboy is thrown from the horse he was riding, while the judge stands by with his hand on a yellow flag.

A horse frightened by a yellow flag trows his rider.
++++++++++
true or not.
it is not possible to tell

Premise & hypothesis.
Blond woman in black cycling outfit and bicycle helmet getting on a ten speed bike.

A woman racing in a event.
++++++++++
true or not.
it is not possible to tell

Premise & hypothesis.
Two people are riding along the side of the road on bicycles, the one in front is wearing a helmet.

Two people are riding along the side of the road on scooters, the one in front is wearing a straw hat.
++++++++++
true or not.
no