About: http://webisa.webdatacommons.org/300022754

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	Although other metals such as gold, zinc, lead and copper are also produced and sold, silver is still the main source of PAAS revenue.
http://www.w3.org/ns/prov#wasQuotedFrom	gurufocus.com