Anchor: A boy in a blue basketball uniform, number 13 and a boy in a white basketball uniform, number 23 jump for the ball.
Entailed: The boys are wearing uniforms.
Contradiction: The boys are all wearing ballet costumes.
Contradiction: The answer is a firm no! 
Contradiction: A lady exercises on the beach.
Contradiction: It stays out of the river.
Contradiction: It's nearly a protection scheme.