About: http://webisa.webdatacommons.org/441807951

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	A CD is a sandwich of different layers, and data is stored on the middle layer, which is made of reflective aluminium.
http://www.w3.org/ns/prov#wasQuotedFrom	bbc.co.uk