About: http://webisa.webdatacommons.org/166153971

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 quality element 652 may be molded or cast from an optical plastic, such as PMMA, polystyrene or polycarbonate.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com