About: http://webisa.webdatacommons.org/425177161

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	Although the rafters and purlins may be of wood or other material, it is preferred to use rectangular extruded aluminum tubing.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com