Anchor: A big brown dog swims towards the camera.
Entailed: A dog swims towards the camera.
Contradiction: A dog is chasing a stick.
Contradiction: The agencies had no criteria to evaluate executives. 
Contradiction: There are people on a bus.
Contradiction: There were 40 publications using MESH terms during the year 2000.
Contradiction: Audits should be designed to detect illegal actions with reasonable accuracy.