About: http://webisa.webdatacommons.org/159061084

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 earth is a giant magnet, the soil and rocks are magnetized and there are strong magnetic fields in the atmosphere.
http://www.w3.org/ns/prov#wasQuotedFrom	healthy.net