About: http://webisa.webdatacommons.org/321523037

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	It should be noted that filtering fluid 21 may be virtually any medium, including a gas, a gelatin resin, or some other fluid which may be adapted to filter light and selectively move into, and out of, the optical path.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com