Complex sentence: Rheinmetall AG is a German automotive and defense company with factories in Düsseldorf, Kassel and Unterlüß, and has a long tradition of making guns and artillery pieces.
Split into simpler sentences: Rheinmetall AG is a German automotive and defense company with factories in Düsseldorf, Kassel and Unterlüß. The company has a long tradition of making guns and artillery pieces.