About: http://webisa.webdatacommons.org/329114941

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	But since Powell's epic trip in 1869, a half million people have made the journey, and there is an entire library of books, maps and guides describing each rapid and eddy in the river.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com