How many population of people of 25 to 64 and over 65 years combined?
return people ;return #1 that are from  25 to 64 years ;return #1 that are over 65 years ;return number of  #2 ;return number of  #3 ;return the  sum of #4 and  #5
['select', 'filter', 'filter', 'aggregate', 'aggregate', 'arithmetic']