Complex sentence: Conried was followed by the 27-year tenure, from 1908 to 1935, of the magisterial Giulio Gatti-Casazza, whose model planning, authoritative organizational skills and brilliant casts raised the level of Metropolitan Opera to a prolonged and unforgettable Silver Age.
Split into simpler sentences: Conried was followed by the 27-year tenure, from 1908 to 1935, of the magisterial Giulio Gatti-Casazza. His model planning, authoritative organizational skills and brilliant casts raised the level of Metropolitan Opera to a prolonged and unforgettable Silver Age.