Anchor: A snowboarder grinds a wooden box over a melted patch of snow.
Entailed: Snowboarder grinds a box
Contradiction: skier grinds a box
Contradiction: We don't need to worry about our country. 
Contradiction: A woman is hanging.
Contradiction: The foolproof plan was highly feasible and they decided to implement it.
Contradiction: A show would be excited to acquire this.