About: http://webisa.webdatacommons.org/174685540

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	Various metals such as Copper, Gold, and Silver were introduced later on.
http://www.w3.org/ns/prov#wasQuotedFrom	silvertribe.com