Complex sentence: The French phrase "selon Matignon" is used in the same way as the British phrase "according to Number 10 Downing St" and the American phrase "according to the White House".
Split into simpler sentences: The French phrase "selon Matignon" is used in the same way as the British phrase "according to Number 10 Downing St". This is used in the same way as the American phrase "according to the White House".