Complex sentence: Mirta Díaz-Balart is the aunt of current Republican and anti-Castro former U.S. Congressman Lincoln Diaz-Balart and his brother Mario Diaz-Balart (R-FL) and sister of the painter Waldo Diaz-Balart and the late Rafael Diaz-Balart.
Split into simpler sentences: Mirta Díaz-Balart is the aunt of anti-Castro former Republican U.S. Congressman Lincoln Diaz-Balart and his brother Mario Diaz-Balart (R-FL). She is the sister of the painter Waldo Diaz-Balart and the late Rafael Diaz-Balart.