Complex sentence: The cities Maubeuge (France) and Charleroi (Belgium) lie along the river Sambre which flows through the French départements Aisne and Nord and the Belgian provinces Hainaut and Namur.
Split into simpler sentences: The cities Maubeuge (France) and Charleroi (Belgium) lie along the river Sambre. The river Sambre flows through the French départements Aisne and Nord and the Belgian provinces Hainaut and Namur.