About: http://webisa.webdatacommons.org/119189558

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	As for the magnetic substances, alloys or compounds containing elements indicating ferromagnetism such as iron, cobalt and nickel including ferrite and magnetite are suitable.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com