About: http://webisa.webdatacommons.org/375707488

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	The functional element preferably has one or more radiopaque elements or compounds from the group including platinum, iridium, gold, tungsten, tantalum, yttrium, zirconium, ytterbium, alloys of these metals, and iodine compounds.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com