Original sentence: After the Franco-Prussian War and the unification of Germany, Mulhouse was annexed to the German Empire as part of the territory of Alsace-Lorraine (1870-1918).Alsace-Lorraine was returned to France in 1918.Mulhouse (French: Mulhouse, pronounced ; Alsatian: Milhüsa; ) is a town and commune in eastern France close to Swiss and German borders
Edited sentence: After the Franco-Prussian War and the unification of Germany, Mulhouse belonged to the German Empire as part of the territory of Alsace-Lorraine (1870-1918).Alsace-Lorraine was annexed by France in 1918.Mulhouse (pronounced  in French; Alsatian: Milhüsa; ) is a town and commune in eastern France close to Swiss and German borders