<http://webisa.webdatacommons.org/164008691>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/262141067>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/164008691> .
<http://webisa.webdatacommons.org/164008691>	<http://www.w3.org/ns/prov#value>	"Since most of the commodities we use are non-renewable - crude oil, for instance - it is at least reasonable to suppose that we have a depletion problem." .
<http://webisa.webdatacommons.org/164008691>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<blogspot.co.uk> .