About: http://webisa.webdatacommons.org/296763477

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	Probably a hundred coins have been ruined for every coin that has been helped by cleaning, particularly if the cleaning is done by someone it is not extremely familiar with the technique and its likely results.
http://www.w3.org/ns/prov#wasQuotedFrom	numismaster.com