<http://webisa.webdatacommons.org/236261975>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/236261975>	<http://www.w3.org/ns/prov#value>	"Since 1997, commercial jet engine manufacturers have had to meet federal standards for emissions of volatile organic compounds, carbon monoxide and oxides of nitrogen, but not specifically for toxins such as benzene." .
<http://webisa.webdatacommons.org/236261975>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<questia.com> .
<http://webisa.webdatacommons.org/prov/34678620>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/236261975> .