About: http://webisa.webdatacommons.org/142216974

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, polarizing film, film to regulate the phase difference, or IR films, etc., suitably within the optical path shown by an arrow in FIG. 30A.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com