About: http://webisa.webdatacommons.org/31927076

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	Sextant - a navigational instrument invented in 1757 and used as the primary device to measure a ship's latitude and longitude for more than 200 years; until being mostly replaced by the Global Positioning System.
http://www.w3.org/ns/prov#wasQuotedFrom	photographers1.com