About: http://webisa.webdatacommons.org/199526280

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	A preferred gas used to carry abrasive to the tooth is air, although other safe, non-flammable gasses such as nitrogen or carbon dioxide, may be used.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es