About: http://webisa.webdatacommons.org/52983128

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 such a concave pit on an optical disc certifies that the optical disc is a legitimate optical disc produced by an authorized manufacturer.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com