About: http://webisa.webdatacommons.org/193369005

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	Thousands of years ago, the Great Wall of China was built to keep out Mongols and other invaders.
http://www.w3.org/ns/prov#wasQuotedFrom	simpsonstreetfreepress.org