About: http://webisa.webdatacommons.org/405935590

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 magnitude and direction of the magnetic field at that time (or at a related time) can be compared with maps, databases, or other information describing the magnitude and direction of the earth's magnetic field.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com