About: http://webisa.webdatacommons.org/421613718

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	It is suggested that the ventilation tube 10 be composed of a flexible, elastomeric material such as silicone or polyurethane.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk