About: http://webisa.webdatacommons.org/124341533

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	Further, more and more of it is not simply oil, pumping itself out of a pipe straight into a barrel, but oil mixed with mineral, sand, or other contaminants requiring significant filtering (and safe disposal) all adding to the cost.
http://www.w3.org/ns/prov#wasQuotedFrom	arstechnica.com