Anchor: A brown dog chases another brown dog who has a green ball.
Entailed: The dog is running.
Contradiction: The black dog is chasing the brown dog.
Contradiction: The dog crawled on the floor, trying to scratch its itchy belly.
Contradiction: It is possible to estimate the amount of ammonia needed for a recipe.
Contradiction: Someone knocked over the bike rider.
Contradiction: The men gather around the fence.