Premise & hypothesis.
A boy is up in the air on his bicycle, and there is a city landscape in the background.

Some one is airborne on a contraption of some kind; a city is within view.
++++++++++
true or not.
yes

Premise & hypothesis.
A little boy is laying on his stomach, with his chin in his hands, on the grass.

The little boy is sleeping in bed.
++++++++++
true or not.
no

Premise & hypothesis.
An elderly man drives a unique firetruck.

The man is rushing to put out a fire.
++++++++++
true or not.
it is not possible to tell