<http://webisa.webdatacommons.org/133687482>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<unitar.org> .
<http://webisa.webdatacommons.org/prov/48903668>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/133687482> .
<http://webisa.webdatacommons.org/133687482>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/133687482>	<http://www.w3.org/ns/prov#value>	"Some areas polluted by petroleum products and other chemicals have not been investigated enough yet to establish the levels to which their soil and underground layers are polluted." .