About: http://webisa.webdatacommons.org/405735387

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 ancient abacus eventually evolved into a slate with grooves into which counters such as rocks, would be placed to mark numbers.
http://www.w3.org/ns/prov#wasQuotedFrom	smartbrain.com