Anchor: Skateboarders do tricks on steps outside of building.
Entailed: Skateboarders do tricks
Contradiction: The skateboarders are sitting down
Contradiction: A couple are at a 3D concert.
Contradiction: She was sitting down for a while and then she screamed and ran away. 
Contradiction: The novelty of the cases make them much easier.
Contradiction: The Scottish National Portrait is near St. Andre's Square.