Anchor: Below the Temple of Athena is the steep cavea of the theatre, set in a shallow depression in the hillside.
Entailed: The theatre is located in a hollow in the hillside.
Contradiction: The theatre is located on the plain three miles from the hill.
Contradiction: Regulating regulations is a productive way to do things, and raising the rent is going to be a pleasant surprise for the renters.
Contradiction: Two dogs are playing with each other.
Contradiction: Knowledge is roaming free 
Contradiction: Three people are sitting around a table.