About: http://webisa.webdatacommons.org/384840341

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 gonioscopic optical elements 1610, 1634 can be made from a variety of materials, such as glass, plastic, silica or other transparent materials as discussed above.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com