Premise & hypothesis.
The pitcher for the "O-Backs" is making a pitch while the infield umpire watches.

People are playing a game.
++++++++++
true or not.
yes

Premise & hypothesis.
A professional motor racer in motion.

There is a guy racing a motorcyle on the street.
++++++++++
true or not.
yes

Premise & hypothesis.
Two helmeted police officers on horseback turn back towards the direction of the camera.

Two police officers on horseback are being filmed by the evening news.
++++++++++
true or not.
it is not possible to tell