About: http://webisa.webdatacommons.org/137432646

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	Further, the operator may set optical systems such as optical lenses, films having polarizing function, films to regulate the phase difference.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com