Anchor: A black and white dog is playing with a white ball.
Entailed: A black and white dog is playing with a red ball.
Contradiction: Puppets have a string.
Contradiction: A black and white cat is playing with a white string.
Contradiction: Two ladies are tanning on the beach.
Contradiction: A group of people are gathered together.
Contradiction: The Comptroller General has always been vocally opposed to this policy.