premise: Spiess Tuning is the common identity of Siegfried Spiess Motorenbau GmbH, a motor vehicle engine tuning company based in Ditzingen, Baden-Württemberg, Germany. Today Spiess Tuning is most famous for its Formula 3 motor racing engines based on the Opel Family II and two iterations of Volkswagen R4 engines.
hypothesis: Two iterations of Volkswagen R4 engines helped to inspire the Formula 3
reason: It is stated that the Formula 3 racing engine was based on the Opel Family II and two iterations of the Volkswagen R4 engines. So it would go to say that those engines helped the formulation of the Formula 3, thus assisting in inspiring it. Not sure why it didn't register with the system even though I only mentioned one of the types of engines used in developing the Formula 3.