Complex sentence: Written by Carl Zuckmayer, Karl Vollmöller and Robert Liebmann--with uncredited contributions by Sternberg--it is based on Heinrich Mann's 1905 novel "Professor Unrat" ("Professor Garbage") and set in Weimar Germany.
Split into simpler sentences: Written by Carl Zuckmayer, Karl Vollmöller and Robert Liebmann--with uncredited contributions by Sternberg. It is based on Heinrich Mann's 1905 novel "Professor Unrat" ("Professor Garbage"), and set in Weimar Germany.