Original sentence: Historian Klaus Zernack further divides the Germania Slavica into a Germania Slavica I between the Elbe and Saale rivers in the west and the Oder in the east, which had been attached to the Frankish and later Holy Roman Empire as marches; and a Germania Slavica II east of Germania Slavica I and west of the Kingdom of Poland, comprising the Silesian, Pomeranian, and Prussian duchies as well as the Neumark
Edited sentence: Historian Klaus Zernack further divides the Germania Slavica into a Germania Slavica I between the Elbe and Saale rivers in the west and the Oder, Queis and Bober in the east, which had been attached to the Frankish and later Holy Roman Empire as marches; and a Germania Slavica II east of Germania Slavica I and west of the late medieval Kingdom of Poland, comprising the Silesian, Pomeranian, and Prussian duchies as well as the Neumark