Anchor: Brown dog chasing black dog through snow.
Entailed: A dog is chasing another dog.
Contradiction: A dog is chasing a burglar through the snow.
Contradiction: This would be perfectly in line with Congress' established role for GAO.
Contradiction: Explore the streets, the open markets, the cafe and get out. 
Contradiction: France gave Louisiana to the United States.
Contradiction: Two cars racing.