About: http://webisa.webdatacommons.org/383263295

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	I guess commodities are the easiest since errors are not costly, the stuff can simply be used later if there is to much of it now.
http://www.w3.org/ns/prov#wasQuotedFrom	cfr.org