About: http://webisa.webdatacommons.org/370646955

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	For centuries base metal - namely copper - had been 'transmuted' to different metals with quite different characteristics of hardness, strength and colour, by adding various types of 'stone' to it.
http://www.w3.org/ns/prov#wasQuotedFrom	newscientist.com