About: http://webisa.webdatacommons.org/190698136

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	Normally, such wastes are treated so as to extract all the metallic materials contained therein, which besides the above mentioned precious metals, may sometimes include also other metals, in particular copper.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com