Anchor: A barefooted young man rides his skateboard up a ramp.
Entailed: A man is on a skateboard.
Contradiction: A man is riding motocross.
Contradiction: We stayed with the doctors. 
Contradiction: I was sitting on a piece of furniture.
Contradiction: The president felt stressed out and very worried.
Contradiction: A tightly wrapped face suited the shrouded female of antiquity whose intelligence flowered secretly.