Anchor: This is what has happened in the eastern part of the country when states realized that emissions from sources in other states were significantly contributing to their 1-hour ozone non-attainment problems.
Entailed: This is what's happened in the east of the country. 
Contradiction: This has happened in the western part of the country when states realised emissions from other sources were negligible. 
Contradiction: A man buys an engagement ring for his girlfriend.
Contradiction: The island Belle Isle is owned by the Curwen family.
Contradiction: Cyclists wait while a man and a dog cross the road.
Contradiction: Child using an old egg beater.