About: http://webisa.webdatacommons.org/402691843

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	Other metals, including silver, copper, iron, tin, and lead, represented less than perfect quantities of each abstract element and often included impurities.
http://www.w3.org/ns/prov#wasQuotedFrom	chemheritage.org