About: http://webisa.webdatacommons.org/54359837

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 addition, other materials can serve as the radiopaque agents such as, for example, tantalum, tungsten, gold, silver or other metallic powders or salts such as calcium or HA salt.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com