Complex sentence: Alexandre Florian Joseph, Duke Colonna-Walewski (May 4,1810-October 27,1868), Polish and French politician and diplomat, was born at Walewice near Warsaw as a son of Napoleon I and his mistress Marie, Countess Walewski.
Split into simpler sentences: Alexandre Florian Joseph, Duke Colonna-Walewski (May 4,1810-October 27,1868) was a Polish and French politician and diplomat. He was the son of Napoleon I and his mistress Marie, Countess Walewski.