Anchor: These challenges are particularly difficult for those pollutants that are not emitted directly but instead form through secondary processes.
Entailed: The pollutants that are not emitted directly have a difficult challenge.
Contradiction: The pollutants that are not emitted directly have an easy task.
Contradiction: As I removed my blade, he came back to life. 
Contradiction: The picture was of a man with a nose ring.
Contradiction: The performance and accountability needs to decrease.
Contradiction: A blond boy in a brown sweater paints a colorful umbrella