About: http://webisa.webdatacommons.org/239555400

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	But something your forgetting is that when oil and such increase in price, processes and techniques get refined and there is a trade of in the differences.
http://www.w3.org/ns/prov#wasQuotedFrom	slashdot.org