Anchor: A dog with a red collar and its tongue hanging out runs through tall grass.
Entailed: A dog runs through the tall grass.
Contradiction: A dog curls up in front of a warm fire place.
Contradiction: There was no one near the tents.
Contradiction: Since we have become closer, I am attracted to him.
Contradiction: No human can distinguish a single deciview's worth of air pollution. 
Contradiction: I have one more assignment for you.