About: http://webisa.webdatacommons.org/203514107

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 most striking feature of all of these is that their price is largely influenced by world commodity markets and is dependent on factors such as global supply and demand, political instability, and the economies of producer countries.
http://www.w3.org/ns/prov#wasQuotedFrom	ips-dc.org