Premise & hypothesis.
Two employees wearing white caps are working at two computer screens in a dimly lit room.

Two people working on computer
++++++++++
true or not.
it is not possible to tell

Premise & hypothesis.
A smiling man leaning to his right stands behind a smiling woman leaning to her left.

A man and a woman are smiling.
++++++++++
true or not.
yes

Premise & hypothesis.
Many people are walking along a sidewalk.

People are walking in Cincinnati.
++++++++++
true or not.
it is not possible to tell