How many years after the Persian coup d'etat did the the Pahlavi dynasty as of ruling house of the country become established?
return the  Persian coup d'etat ;return the  Pahlavi dynasty as ruling house of the   country did become established ;return year of #1 ;return year of #2 ;return difference of #4 and  #3
['select', 'select', 'project', 'project', 'arithmetic']