Complex sentence: Andrea Albert Pierre Casiraghi (born 8 June 1984) is the elder son of Caroline, Princess of Hanover and her second husband Stefano Casiraghi, and the eldest grandchild of Rainier III, Prince of Monaco, and American actress Grace Kelly.
Split into simpler sentences: Andrea Albert Pierre Casiraghi (born 8 June 1984) is the elder son of Caroline, Princess of Hanover, and her second husband Stefano Casiraghi. He is the eldest grandchild of Rainier III, Prince of Monaco, and American actress Grace Kelly.