Premise & hypothesis.
Saw blade being sharpened on revolving sharpening wheel by a dark-skinned man.

The saw blade is in motion.
++++++++++
true or not.
yes

Premise & hypothesis.
Four young boys playing on a rocky dirt road with an inflated hoop next to a brick building.

the boys are brothers
++++++++++
true or not.
it is not possible to tell

Premise & hypothesis.
Three musicians are performing together.

The musicians are playing music.
++++++++++
true or not.
yes