About: http://webisa.webdatacommons.org/131074366

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	In order to increase accuracy, stellar and solar navigation techniques were improved and augmented through the use of maps, charts, and instruments such as the astrolabe and compass.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk