<http://webisa.webdatacommons.org/135617616>	<http://www.w3.org/ns/prov#value>	"There have been thousands of hours dedicated by toxicologists, health officials and other scientists to set the risk-based criteria for PAHs." .
<http://webisa.webdatacommons.org/prov/112755096>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/135617616> .
<http://webisa.webdatacommons.org/135617616>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<cdc.gov> .
<http://webisa.webdatacommons.org/135617616>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .