About: http://webisa.webdatacommons.org/142203017

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	Suitable windows 14 and 15 are provided to cover the apertures 12 and 13 and should be made of a material such as glass or the like, having a high transmission coeflicient for the frequency of light involved.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca