About: http://webisa.webdatacommons.org/440290161

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 upper portion 31 a is adjustable in height similarly to the upper portion 12 b and is fastened by a set screw or pin and slot arrangement 35, which is similar to the screw or pin and slot arrangement 15.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com