About: http://webisa.webdatacommons.org/406972688

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 core therein may consist entirely of a magnetic material, or it may be formed of solid insulating beads such as glass or plastic having a magnetic coating thereon, or the core may consist of a hollow magnetic ball.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr