Anchor: There are two dogs, one is black and the other is brown, sniffing each other.
Entailed: Two dogs are by each other.
Contradiction: Two cats are sniffing each other.
Contradiction: A man is sleeping.
Contradiction: He wished to visit the hospital dispensary to see for himself where she worked. 
Contradiction: Two people are posing wearing cowboy hats.
Contradiction: A man waits on a couch.