About: http://webisa.webdatacommons.org/9166183

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	In further embodiments, one of the magnets 504 or 506 (and/or 504??? or 506???) may be replaced with a magnetically attractive material, such as, but not limited to a ferrous material including an iron or iron alloy, or the like.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com