Anchor: a black dog with a pink collar is following behind a brown dog with across a grassy field.
Entailed: There are two dogs outdoors.
Contradiction: A black dog and a brown dog are sleeping.
Contradiction: Two dogs are sleeping on a rug by a warm fire.
Contradiction: A black dog has a blue collar
Contradiction: There is only one dog.
Contradiction: A black dog is laying in bed.