About: http://webisa.webdatacommons.org/104290583

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	For example, they may be made of metal such as steel or aluminum or both, and their frames may be of one material and their support surfaces another.An illustrative
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com