Complex sentence: His father, Raffaele Pareto (1812--1882), was an Italian civil engineer and Ligurian marchese whom had left Italy much like Mazzini and other Italian nationalists and his mother, Marie Metenier, was a French woman.
Split into simpler sentences: His father, Raffaele Pareto (1812--1882), was an Italian civil engineer and Ligurian marchese whom had left Italy much like Mazzini and other Italian nationalists. His mother, Marie Metenier, was a French woman.