Complex sentence: After his guest shot on "The Monkees", Colonna suffered a stroke whose paralytic effect forced his retirement from show business, and a 1979 heart attack forced him to spend the last seven years of his life in the Motion Picture and Television Hospital.
Split into simpler sentences: After his guest shot on "The Monkees", Colonna suffered a stroke. Its paralytic effect forced his retirement from show business, and a 1979 heart attack forced him to spend the last seven years of his life in the Motion Picture and Television Hospital.