Anchor: A man with a black helmet is sitting on a black motorcycle.
Entailed: A man sits on a motorcycle.
Contradiction: A man is riding a horse in the barn.
Contradiction: A dog is being walked on the beach.
Contradiction: Kids and their parents play a game where water is squirted at a target
Contradiction: I know what you're talking about. 
Contradiction: Three people were opening their Christmas gifts.