Anchor: A little boy in a helmet is doing tricks on a skateboard.
Entailed: There is a boy riding a skateboard.
Contradiction: The boy is riding a scooter at the park.
Contradiction: a man breaks a laptop
Contradiction: There is two young girls sharing a music stand, play violas.
Contradiction: These 120 passenger cars will make the trip in about 2 hours.  
Contradiction: Backdoor sniping has become prevalent.