Complex sentence: Mary was brought up in Poltalloch, Argyll, Scotland and until the age of 16 attended the Lycée Français Charles de Gaulle in South Kensington, London.
Split into simpler sentences: Mary was brought up in Poltalloch, Argyll, Scotland. Until the age of 16, she attended the Lycée Français Charles de Gaulle in South Kensington, London.