Anchor: Nor do Hollywood movies show any sign of revising Nixon's image.
Entailed: Nixon's image is not revised by Hollywood.
Contradiction: Nixon's image will be redone by Hollywood. 
Contradiction: A student is waiting for a bus at the station.
Contradiction: There are four basic categories recognized by the current practice.
Contradiction: The dog is standing on the stairs.
Contradiction: Smoking is harmful to your lungs.