Do both Königskinder and The Knot Garden exist in multiple versions?
Königskinder Königskinder (German for "The King's Children") is a stage work by Engelbert Humperdinck that exists in two versions: as a melodrama and as an opera or more precisely a "Märchenoper". The libretto was written by Ernst Rosmer (pen name of Else Bernstein-Porges), adapted from her play of the same name.
Knot complement In mathematics, the knot complement of a tame knot "K" is the three-dimensional space surrounding the knot. To make this precise, suppose that "K" is a knot in a three-manifold "M" (most often, "M" is the 3-sphere). Let "N" be a tubular neighborhood of "K"; so "N" is a solid torus. The knot complement is then the complement of "N",