Anchor: An adolescent skateboards at the skate park on the beach in front of onlookers.
Entailed: There are people watching skateboarders.
Contradiction: An adolescent is at home sleeping.
Contradiction: A BIRD HAS A WORM IN ITS BEAK
Contradiction: a man is walking
Contradiction: The policies currently in place are the best possible for design.
Contradiction: At it--look!