About: http://webisa.webdatacommons.org/216692517

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	The astrolabe was an astronomical instrument designed to measure the altitude of the sun or stars, and was mostly used for astronomy and navigation.
http://www.w3.org/ns/prov#wasQuotedFrom	saylor.org