About: http://webisa.webdatacommons.org/147213286

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 grating can be composed of a very thin layer (0.005 inch thick) of an inert epoxy, perhaps coated with a few hundred Angstroms of a reflective material such as aluminum, gold, platinum or other metal.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es