About: http://webisa.webdatacommons.org/231528296

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	Other articles grow in importance, such as copper, petroleum, iron and steel products, various manufactures.
http://www.w3.org/ns/prov#wasQuotedFrom	libertyfund.org