Anchor: Two brown dogs are biting each other.
Entailed: There are two dogs.
Contradiction: A cat is scratching a dog.
Contradiction: Insurers didn't respond to pressure by passing problems onto hospitals.
Contradiction: I will go there tonight to see if I can convince them to not enforce their rules for my benefit. 
Contradiction: My problem is very huge and I know who to ask next.
Contradiction: A man is moving.