About: http://webisa.webdatacommons.org/58851334

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	Conventional chemical analysis shows that bitumens contain mainly carbon and hydrogen with small amounts of oxygen, nitrogen and sulphur and trace amounts of metals.
http://www.w3.org/ns/prov#wasQuotedFrom	e-asphalt.com