About: http://webisa.webdatacommons.org/360473456

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	Achieving a stable or growing population was a far greater challenge to medieval civilizations than it is for our own.
http://www.w3.org/ns/prov#wasQuotedFrom	ncregister.com