About: http://webisa.webdatacommons.org/428078741

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 tested by experienced petroleum chemists working with samples obtained from petroleum cargo tankers, reservoirs, pipelines, storage tanks, refineries, E&P projects, and other sources.
http://www.w3.org/ns/prov#wasQuotedFrom	intertek.com