About: http://webisa.webdatacommons.org/217405775

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	Now usually ???marginal??? means least profitable but it???s unclear as the document does not discuss other forms of production.
http://www.w3.org/ns/prov#wasQuotedFrom	priceofoil.org