About: http://webisa.webdatacommons.org/83141470

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	Bulky materials such as iron or aluminium ore are no use for trade for obvious reasons- huge transportation costs.
http://www.w3.org/ns/prov#wasQuotedFrom	samizdata.net