About: http://webisa.webdatacommons.org/276433718

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	The answer has to do with differences in the types of oil that can most efficiently be processed by different refineries and the cheapest way to transport the right type of oil to each refinery.
http://www.w3.org/ns/prov#wasQuotedFrom	econbrowser.com