About: http://webisa.webdatacommons.org/172584802

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	It may be that it depends" is the best possible answer for a real river, but I think there has to be a physics answer for the idealized river.
http://www.w3.org/ns/prov#wasQuotedFrom	paddling.net