Complex sentence: After the treaty of Versailles forbade Germany to produce airplanes, Fokker moved his business, to the Netherlands where his company was responsible for a variety of successful aircraft including the Fokker trimotor, a successful passenger aircraft of the inter-war years.
Split into simpler sentences: After the treaty of Versailles forbade Germany to produce airplanes, Fokker moved his business to the Netherlands. There his company was responsible for a variety of successful aircraft including the Fokker trimotor, a successful passenger aircraft of the inter-war years.