About: http://webisa.webdatacommons.org/222019224

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	Preferably, however, the tubes are a metal selected from copper, copper alloys, low carbon steel, stainless steel, aluminum alloys, titanium alloys or the like.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com