<http://webisa.webdatacommons.org/concept/national+emission_standards_>	<http://webisa.webdatacommons.org/ontology#hasHead>	"standards" .
<http://webisa.webdatacommons.org/concept/national+emission_standards_>	<http://webisa.webdatacommons.org/ontology#hasPreModifier>	"national emission" .
<http://webisa.webdatacommons.org/concept/national+emission_standards_>	<http://www.w3.org/2000/01/rdf-schema#label>	"national emission standards" .