About: http://webisa.webdatacommons.org/421689981

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 last century, and especially in the last few decades, the borders between most countries have closed and become tightly controlled.
http://www.w3.org/ns/prov#wasQuotedFrom	pbskids.org