About: http://webisa.webdatacommons.org/158131473

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 one approach, when data is stored on the optical disk its location is maintained in some sort of directory or index stored on a companion magnetic floppy or magnetic hard disk.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com