About: http://webisa.webdatacommons.org/353183752

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	In general, the sales prices referenced in these contracts are market-based and may include pricing differentials for such factors as delivery location or crude oil composition.
http://www.w3.org/ns/prov#wasQuotedFrom	sec.gov