About: http://webisa.webdatacommons.org/197792685

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	instruments such as the compass or anemometer or of the estimated chart position.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com