Premise: Two guys, one black and one white, smiling for the camera.

Hypothesis: The two guys are co-workers.
it is not possible to tell

Premise: A young man in a blue shirt sits in front of a group of blue and white umbrellas.

Hypothesis: The man is near umbrellas.
yes

Premise: A dog running on a beach.

Hypothesis: A animal is on the sand.
it is not possible to tell

Premise: A male playing air guitar on a green field.

Hypothesis: The man is performing air guitar outside.
yes