Anchor: A river guide boat gently going down a river past a house.
Entailed: A boat is cruising down a river by a house.
Contradiction: A river boat is sinking in a river by a factory.
Contradiction: It's been awful talking to you, hope I never see you again.
Contradiction: Many perceived Johnson as a skillful conniver.
Contradiction: The man is playing the piano.
Contradiction: A city street is crowded.