Anchor: A snowboarder, wearing a blue jacket and green pants, snowboards down a hill.
Entailed: The snowboarder is riding his snowboard.
Contradiction: The snowboarder is riding the lift to the top of the hill.
Contradiction: man fishing in the lake
Contradiction: Air quality models face two key challenges.
Contradiction: dogs sit on a ledge
Contradiction: You don't think they ended up doing a quality analysis, do you?