Complex sentence: He also worked as a military consultant for several films: his participation in the production of Günther Rücker's "Die Besten Jahre" won him the Heinrich Greif Prize, 2nd degree, at 17 May 1966.
Split into simpler sentences: He also worked as a military consultant for several films. His participation in the production of Günther Rücker's "Die Besten Jahre" won him the Heinrich Greif Prize, 2nd degree, at 17 May 1966.