About: http://webisa.webdatacommons.org/138634644

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	They were formerly built on this river, particularly at Pittsburgh and Ma- rietta; but the difficulties incident to getting them to the ocean, have rendered such undertakings unfrequent.
http://www.w3.org/ns/prov#wasQuotedFrom	uky.edu