About: http://webisa.webdatacommons.org/94142357

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 origin of private markets and trade routes is most dramatically evident in prehistoric trade goods such as obsidian, a brittle volcanic glass that can be chipped into knife blades, mirrors and other implements.
http://www.w3.org/ns/prov#wasQuotedFrom	freerepublic.com