About: http://webisa.webdatacommons.org/327163701

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 reason is that each of the magnetic film and the protective film formed on the substrate is a thin film, so that the surface shape of the substrate appears in an unchanged manner on the surface of the disk.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es