About: http://webisa.webdatacommons.org/201016133

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 first and second tubular members may be glass tubes, although materials such as suitable metals or synthetic plastics may be used.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk