About: http://webisa.webdatacommons.org/392005075

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 each frame member is extruded material such as plastic or metal, for example a commercial PVC extruded to about 60-90thousandths (inch) thick is usable.
http://www.w3.org/ns/prov#wasQuotedFrom	patentgenius.com