About: http://webisa.webdatacommons.org/91249376

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	In the eyes of the nomadic tribes, the Great Wall was a barrier that blocked their invasion southward.
http://www.w3.org/ns/prov#wasQuotedFrom	festivesearch.com