Text: Modeling shows that when full implementation of existing regulations such as the acid rain program, the NOx SIP Call, the Tier II standards for cars and trucks, the heavy duty diesel engine standards, and the low sulfur gasoline and diesel fuel rules are taken into account, additional reductions will be needed to bring areas into attainment.
Entailment: The acid rain program is an existing regulation.
Contradiction: The acid rain program is not a regulation.