Premise & hypothesis.
A young man high in the air performing a bicycle stunt.

The young man throws his body off the bicycle's seat while in the air.
++++++++++
true or not.
it is not possible to tell

Premise & hypothesis.
The blond woman is searching for medical supplies in a suitcase.

A brunette woman checks her suitcase before boarding a plane.
++++++++++
true or not.
no

Premise & hypothesis.
A black dog and a white dog with brown spots are staring at each other in the street.

The two dogs are looking at each other.
++++++++++
true or not.
yes