How many more people were of American ancestry compared to those of either French or Italian descent?
return people ;return #1 that have American ancestry ;return #1 that have French descent ;return #1 that have Italian descent ;return number of  #2 ;return number of  #3 ;return number of  #4 ;return sum of #6 and  #7 ;return the  difference of #5 and  #8
['select', 'filter', 'filter', 'filter', 'aggregate', 'aggregate', 'aggregate', 'arithmetic', 'arithmetic']