Did the US sell more aircraft or helicopters to Bahrain?
return US ;return aircraft that #1 sell ;return helicopters that #1 sell ;return #2 to Bahrain ;return #3 to Bahrain ;return number of  #4 ;return number of  #5 ;return which is highest of #6 ,  #7
['select', 'project', 'project', 'filter', 'filter', 'aggregate', 'aggregate', 'comparison']