About: http://webisa.webdatacommons.org/299737360

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	Description of Related ArtHeavy hydrocarbon feedstocks are generally viscous and may be entrained with other components such as rock, sand, clay, and other minerals.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com