Anchor: A man does a bicycle trick on a concrete obstacle.
Entailed: A man is riding a bike.
Contradiction: A man is skateboarding.
Contradiction: Actuarial Cost Methods is a made-up term that has no real meaning in the actuarial profession. 
Contradiction: The girl has scored a point.
Contradiction: I never watched television in the afternoon.
Contradiction: Children outdoors near the water.