About: http://webisa.webdatacommons.org/130810139

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	Crude oil is made up of a complex mixture of hydrocarbons and impurities such as oxygen, nitrogen, sulfur, and metals.
http://www.w3.org/ns/prov#wasQuotedFrom	greenanswers.com