About: http://webisa.webdatacommons.org/300604363

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	Such naturally occurring metals, especially iron and copper, which do not require smelting or even melting, are obvious candidates for the earliest sources of metal.
http://www.w3.org/ns/prov#wasQuotedFrom	shef.ac.uk