sentences:  He was one of the co-founders of the artists' federation, the Union des Artistes Allemandes Libres, an organization of exiled German artists founded in Paris in autumn 1937.In that same year, he became the companion of the dancer Tatjana Barbakoff.Meanwhile, in Munich, three of his pictures were displayed in the defamatory Nazi exhibition "Entartete Kunst" (Degenerate Art) in 1937.