Premise & hypothesis.
A group of bicyclists ride up the street.

A group of bicyclist ride down a hill.
++++++++++
true or not.
no

Premise & hypothesis.
A martial arts student attempts to deliver a kick to his sparring partner as fellow students look on.

Some people practice martial arts.
++++++++++
true or not.
yes

Premise & hypothesis.
One man wearing a white hat to shade his eyes from the sun, he has a pole connected to a net in hand and is sifting through the water, cleaning a water fountain, as people walk on the sidewalk in the background.

A tall person with a hat
++++++++++
true or not.
it is not possible to tell