Anchor: A black dog walks through a rocky, grassy landscape under a blue, cloudy sky.
Entailed: The dog is walking.
Contradiction: The dog is taking a nap by the bush.
Contradiction: The father and the two kids are playing on the beach.
Contradiction: There is an equation for price increase.
Contradiction: This is the most reliable test for any type of drinking problem. 
Contradiction: The swimmers are at the edge of the pool.