Anchor: Two puppies inside a vehicle are watching a woman exit another vehicle close by.
Entailed: Two dogs in a car are watching a woman.
Contradiction: Some dogs are playing in the park.
Contradiction: Because of the possible toxicity of thiosulfate to test organisms, a control lacking thiosulfate should not be included in toxicity tests utilizing thiosulfate-dechlorinated water.
Contradiction: Huge, powerful, fast sound pretty good for the first three qualities listed. 
Contradiction: A surfer is hiking on the mountains.
Contradiction: A gymnast performing an action.