Complex sentence: It was a co-production between Gainsborough Studios and UFA initiating a decade-long series of co-productions which only ended with the rise to power of the Nazi Party in the 1930s.
Split into simpler sentences: It was a co-production between Gainsborough Studios and UFA. Cook p.16-17 It initiated a decade long series of co-productions which only ended with the rise to power of the Nazi Party in the 1930s.