Anchor: A guy going off a ramp on a skateboard.
Entailed: A person going off a ramp on a skateboard.
Contradiction: A girl going off a ramp on a skateboard.
Contradiction: The man is floating down a river.
Contradiction: A bird is confined while near a man.
Contradiction: It's easy to keep clean and organized. 
Contradiction: A man is sculting a strange piece of art.