Anchor: If, for example, there were no benefits of reducing PM concentrations below the proposed PM2.
Entailed: To give an example, if lowering PM concentrations below the suggested PM2 provided no benefits.
Contradiction: This doesn't give an example.
Contradiction: There have been no requests by Persons With Disabilities. 
Contradiction: The woman is outside.
Contradiction: The man is lounging on the couch.
Contradiction: Someone is making food.