Original sentence: Within its zone the British military government restituted the traditional German state of Hamburg (but in borders drawn by the Nazis in 1937) and established the new states of Schleswig-Holstein (formed in 1946 from the Prussian Province of the same name), Lower Saxony (a merger of the restituted Free States of Brunswick, Oldenburg and Schaumburg-Lippe with the Prussian province of Hanover in 1946) and North Rhine-Westphalia (a merger of the restituted Free State of Lippe and the northern part of the Prussian provinces of the Rhineland (with the southern part under French occupation) and Westphalia in 1946/47)
Edited sentence: Within its zone the British military government restituted the traditional German state of Hamburg (but in borders drawn by the Nazis in 1937) and established the new states of Schleswig-Holstein (formed in 1946 from the Prussian Province of the same name), Lower Saxony (a merger of the restituted Free States of Brunswick, Oldenburg and Schaumburg-Lippe with the Prussian province of Hanover in 1946) and North Rhine-Westphalia (a merger of the restituted Free State of Lippe and the northern part of the Prussian provinces of the Rhineland (with the southern part under French occupation) and Westphalia in 1946–47)