Assertion: eau rouge | /r/HasProperty | a border river
Facets:
value: for several periods in its existence
type: TEMPORAL
Source sentences:
text: The Eau Rouge has been a border river for several periods in its existence, including an administrative boundary under the Roman Empire between Cologne and Tongeren, and the state border between the Netherlands and Prussia from 1815 to 1839 and then between Belgium and Prussia from 1839 to 1919.