About: http://webisa.webdatacommons.org/341215971

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	One face of the disc was flat, but the other had been ground to make it convex, using some sort of precision tool.
http://www.w3.org/ns/prov#wasQuotedFrom	s8int.com