About: http://webisa.webdatacommons.org/370780326

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	Commonly, metals such as iron and aluminum are used as mordants, and both of these metals have a valency of three.
http://www.w3.org/ns/prov#wasQuotedFrom	wisegeek.com