About: http://webisa.webdatacommons.org/38075427

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 tube 22 may be made of any suitable material, but is preferably metal, such as aluminum, cold rolled steel, stainless steel or brass.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com