About: http://webisa.webdatacommons.org/209214111

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 inner and outer screen members can be made of different materials, as for example, different types of polymer (PVC or other), fiber glass, carbon steel, stainless steel or alloy.
http://www.w3.org/ns/prov#wasQuotedFrom	docstoc.com