About: http://webisa.webdatacommons.org/225756726

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 magnetic field at the gap may be created by any means, including electromagnets and permanent magnets.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es