About: http://webisa.webdatacommons.org/230671243

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 material of the convexes 411 may be SiO2, SiNx, or other inorganic material or the like.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca