About: http://webisa.webdatacommons.org/118950948

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 presence of a concave pit and a convex pit having a length 1T-2T on an optical disc certifies that the optical disc is an original optical disc produced by an authorized manufacturer.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com