Premise & hypothesis.
A black dog swims in a large pool.

A dog is in the backyard pool.
++++++++++
true or not.
yes

Premise & hypothesis.
A Russian bicyclist is riding with his head down.

A man is on a red bike.
++++++++++
true or not.
it is not possible to tell

Premise & hypothesis.
A woman is standing by a bike and two children, a boy and a girl, are with her and holding balloons.

A women stands by kids outdoors.
++++++++++
true or not.
it is not possible to tell