About: http://webisa.webdatacommons.org/184207959

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	Alternatively, a gaseous filling medium such as air or oxygen or also a different, preferably biocompatible, gas can be used.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk