About: http://webisa.webdatacommons.org/22002142

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 insulating layers 22, 34, 420 and 422 etc. are preferably made of silicon dioxide, while the layer 427 is preferably made of silicon nitrate, though combinations of these materials and other insulating materials may also be used.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com