Anchor: People cross a busy city street.
Entailed: People cross the street in the city.
Contradiction: People are attacking one another in a park.
Contradiction: We can use this as a weapon for us all. 
Contradiction: There was still a slight grin on Sam's face.
Contradiction: It's helpful for anyone!
Contradiction: The marble came from the same quarries as the Taj Mahal's marble.