About: http://webisa.webdatacommons.org/45107258

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	Copper is a commercially pure metal or one which is alloyed with not more than approximately 1 percent of other elements.
http://www.w3.org/ns/prov#wasQuotedFrom	maritime.org