How many more people living in Indianapolis city under the age of 18 were living below the poverty line compared to those who were 65 or older?
return the  city of Indianapolis ;return people living  below the  poverty line of #1 ;return #2 that are under the  age of 18 ;return #2 that are 65 or  older ;return number of  #3 ;return number of  #4 ;return the  difference of #5 and  #6
['select', 'project', 'filter', 'filter', 'aggregate', 'aggregate', 'arithmetic']