About: http://webisa.webdatacommons.org/455511815

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, an operator may optionally set optical systems such as optical lenses, polarizing film, film to regulate the phase difference, and IR films within the optical path shown by an arrow in FIG. 14D.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com