About: http://webisa.webdatacommons.org/257804146

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	Directions ??? upward or downward - of long-term price trends coming out from these studies vary among different types of commodities and they depend on starting points in time used as a reference.
http://www.w3.org/ns/prov#wasQuotedFrom	worldbank.org