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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	tantalum, tungsten, rhenium, osmium, iridium, platinum and gold; and x is a positive integer such that the atom Z has a closed shell electron configuration;
http://www.w3.org/ns/prov#wasQuotedFrom	docstoc.com