Complex sentence: Until the middle ages, Beeckerwerth was surrounded by water on all sides: on the west and northwest by the Rhine, on the east and northeast by the Emscher and on the south by a branch of the Emscher called the Monnarde.
Split into simpler sentences: Until the middle ages, Beeckerwerth was surrounded by water on all sides. On the west and northwest by the Rhine, on the east and northeast by the Emscher and on the south by a branch of the Emscher called the Monnarde.