Anchor: A greyhound running on a track.
Entailed: Dog running.
Contradiction: Dog lying down in the middle of a dog track.
Contradiction: A child runs past the tree.
Contradiction: It was so cheap, it had been slit and sort of sewn back together. 
Contradiction: This is not just a drop in a bucket.
Contradiction: He pushed with everything he had in a final moment of desperation.