Anchor: Bush signed the Clean Air Act Amendments of 1990, it revolutionized clean air policy regarding regional and national air pollution issues and drove environmental protection in new directions.
Entailed: The Clean Air Act Amendments were signed in 1990.
Contradiction: The Clean Air Act Amendments were signed in 1940.
Contradiction: The roofing crews in Dumas adhere to strict professional standards.
Contradiction: Time and Newsweek have covers featuring Clinton. 
Contradiction: The man is walking down the street
Contradiction: two people are wearing aprons