About: http://webisa.webdatacommons.org/21357440

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 support members may be aluminum, steel, wood, concrete or other hard material that provides firm support and limits edge or perimeter deflections.
http://www.w3.org/ns/prov#wasQuotedFrom	usglassmag.com