Anchor: Over the last 30 years, we have made substantial progress towards improved environmental quality under the Clean Air Act.
Entailed: The Clean Air Act has made progress over the past three decades.
Contradiction: After 3 years they saw no progress.
Contradiction: Two people have a speed-skating race.
Contradiction: The pain began to subside. 
Contradiction: A clown stands nearby laughing deviously as another man is impaled by an angry bull.
Contradiction: A couple of people are outdoors.