Complex sentence: The Roman Republic was a state declared on on February 9,1849, when the government of Papal States was temporarily substituted by a republican government due by the pope's fly to Gaeta, led by Carlo Armellini, Giuseppe Mazzini and Aurelio Saffi.
Split into simpler sentences: The Roman Republic was a state declared on on February 9,1849, when the government of Papal States was temporarily substituted by a republican government due by the pope's flight to Gaeta. The republic was led by Carlo Armellini, Giuseppe Mazzini and Aurelio Saffi.