Anchor: A man and a boy ride a four wheeled vehicle.
Entailed: A boy and man are riding a four wheeled vehicle.
Contradiction: A man and a boy are in a library.
Contradiction: A man is walking with a two wheeled vehicle.
Contradiction: They are flying a plane.
Contradiction: A little boy swings a baseball bat.
Contradiction: The man and the boy are swimming in the ocean.