Premise & hypothesis.
Two men, one in a yellow shirt and bandanna and another in white shirt and sunglasses, are standing on grass and playing with a white frisbee.

Two friends are outside riding bikes together.
++++++++++
true or not.
no

Premise & hypothesis.
School children walk single file under adult supervision.

The adult makes the children behave
++++++++++
true or not.
yes

Premise & hypothesis.
A old man wearing red, white and bluish gray playing music on a stage using a cross-cut saw.

The man's hair is grayed.
++++++++++
true or not.
it is not possible to tell