About: http://webisa.webdatacommons.org/361939948

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 optical element 15 in FIGS. 1 and 2 is a hemiellipsoidal element comprising a substantially transparent material, such as for instance, glass or plastic.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com