Premise & hypothesis.
A man in a Texas Longhorns hat, uses a nail gun on a roof.

A man is working on the roof.
++++++++++
true or not.
yes

Premise & hypothesis.
A crowd of people looking at two guys on motorcycles.

A group is watching motor cyclers
++++++++++
true or not.
yes

Premise & hypothesis.
An audacious motorcyclist who is zooming through a racetrack.

The motorcylist is in a race.
++++++++++
true or not.
it is not possible to tell