About: http://webisa.webdatacommons.org/418911982

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	Pittsburgh was a lonely frontier outpost, St. Louis a smoky French trading village, Indianapolis and Columbus were necessary exchange centers for the farmers and town-builders of Middle America.
http://www.w3.org/ns/prov#wasQuotedFrom	worldmag.com