About: cross-state air pollution rule

Premodifier: cross-state air pollution
Head noun: rule

Same concepts
http://dbpedia.org/resource/Cross-State_Air_Pollution_Rule

Broader concepts

label	provenance	confidence
rule	isap:165761352	0.628123
5	isap:477185208	0.542284

Narrower concepts

label	provenance	confidence