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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	In order to make the material commercially more attractive, the expensive gold could possibly be substituted by other metals, such as copper.
http://www.w3.org/ns/prov#wasQuotedFrom	chemistrytimes.com