About: http://webisa.webdatacommons.org/191025120

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	Grades MS-60 through MS-63 are usually available, while higher grades, especially MS-65 and above, are quite scarce.
http://www.w3.org/ns/prov#wasQuotedFrom	ngccoin.com