Anchor: A girl in a blue swimsuit walks into the ocean.
Entailed: A human walking.
Contradiction: Nobody is walking.
Contradiction: A guy is running down the street and the cops are chasing him.
Contradiction: Does Shannon mean it?
Contradiction: I won't be ready for another three days. 
Contradiction: In fact, the EPA believe that many retrofits will be carried out by 2005 because it is cost effective.