About: http://webisa.webdatacommons.org/162496121

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	Petcoke is composed mainly of carbon and it also contains high levels of sulphur and heavy
http://www.w3.org/ns/prov#wasQuotedFrom	docstoc.com