Anchor: Man rides a bike past an old baseball field
Entailed: The man is riding past a field.
Contradiction: The man walked past the new ball field.
Contradiction: The kids kick the soccer ball into the river.
Contradiction: It is cold at the ice skating ring.
Contradiction: The challenger disaster never occurred. 
Contradiction: The toddler has buried his lags in the sand and is wearing a green shirt.