About: http://webisa.webdatacommons.org/106068003

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	For me, copper is a commodity that has constantly supply constraint.
http://www.w3.org/ns/prov#wasQuotedFrom	seekingalpha.com