Premise: A black dog rolling in the green grass.

Hypothesis: A white dog is chasing a deer.
no

Premise: A baseball player in red leaps into the air to avoid a player in blue, who is shortly behind him as he catches the ball, while other blue team members look on in the background.

Hypothesis: The baseball player in red leaps into the air to catch the ball.
yes

Premise: A man with sunglasses and earphones is on a city street holding an mp3 player in his hand.

Hypothesis: a guy is listening to music on his way to work
it is not possible to tell

Premise: A group of people are sitting on a ledge in front of a building.

Hypothesis: A group of people are on a ledge eating lunch
it is not possible to tell