About: http://webisa.webdatacommons.org/51348352

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 United States is the richest nation on Earth, and below is a graph from the Washington Post, illustrating happiness trends from 1970 to 2000:
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com