About: http://webisa.webdatacommons.org/377595463

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	Sounds like the book is a good one to start with to get a basic handle on commodities, might have to see if I can pick a copy up or at least dredge one out of the library :).
http://www.w3.org/ns/prov#wasQuotedFrom	thesimpledollar.com