About: http://webisa.webdatacommons.org/187415820

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	You need to compare a coin's weight in two different media, such as air
http://www.w3.org/ns/prov#wasQuotedFrom	ancients.info