About: http://webisa.webdatacommons.org/232234739

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	For example, the material of the halfwave plates or quarter-wave plates used as the retardation plates is not limited to polyvinyl alcohol film, but may be polycarbonate, polystyrene, or other polymeric film.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com