Assertion: country's river | /r/HasProperty | the vistula
Facets:
Source sentences:
text: The longest rivers are the Vistula (Polish: Wisła), 1,047 kilometres (651 mi) long; the Oder (Polish: Odra) which forms part of Poland's western border, 854 kilometres (531 mi) long; its tributary, the Warta, 808 kilometres (502 mi) long; and the Bug, a tributary of the Vistula, 772 kilometres (480 mi) long.