Anchor: A black dog is chasing a brown and white dog across the grass.
Entailed: A dog is chasing another dog.
Contradiction: A dog is chasing a cat.
Contradiction: A person runs in the desert.
Contradiction: Pro-bono participation nationally is even worse. 
Contradiction: Two girls are shopping at the mall.
Contradiction: People stand and sit  in front of a building with drawings on it.