About: http://webisa.webdatacommons.org/94991608

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 bases 50,51 are preferably constructed as rails and made of sheet metal, such as steel, or it may be an extruded metal or plastic part.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com