About: http://webisa.webdatacommons.org/280799169

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 airway is preferably composed of a thermoplastic material such as polyvinyl chloride or a non-thermoplastic material such as silicone and can be prepared by extrusion and melt forming as is well known in the art.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com