About: http://webisa.webdatacommons.org/113634857

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 side members may be made of any well-known rigid or substantially rigid material such as wood, plastic or metal.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com