About: http://webisa.webdatacommons.org/82723684

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	THE oil in many of the world's largest reserves, such as the oil sands of Canada and Venezuela, has degraded over millions of years from light, easy-to-use molecules into an acidic, tarry residue that is hard and costly to refine.
http://www.w3.org/ns/prov#wasQuotedFrom	newscientist.com