claim: Corsica is an island.
evidence: The Hartberg River is a small tributary of the Inn River in Upper Austria and originates in the Senftenbach Area .. Austria. Austria. Inn River. Inn River. Upper Austria. Upper Austria. It flows from South to North to the Inn River and merges with it 2 km east of Obernberg am Inn .. Inn River. Inn River. Obernberg am Inn. Obernberg am Inn. The water has a grade between A and B.. Category  : Rivers of Upper Austria. Austria. Austria. Upper Austria. Upper Austria