About: http://webisa.webdatacommons.org/285922728

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	Perhaps you are considering rivers as a travel route but the first, presumably primitive, boats (whenever they were invented) were presumably more suited to use on still water, such as small lakes or ponds rather than moving water.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.ie