About: http://webisa.webdatacommons.org/417099956

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	As we have noted, metallic copper occurs in nature, but with a few exceptions, notably in North America and South Africa, only in minimal quantities.
http://www.w3.org/ns/prov#wasQuotedFrom	marxists.org