How many points higher was the HDI value of Tláhuac than  rural Milpa Alta?
return Tláhuac ;return Milpa Alta ;return HDI value of #1 ;return HDI value of #2 ;return the  points of #3 ;return the  points of #4 ;return the  difference of #5 and  #6
['select', 'select', 'project', 'project', 'project', 'project', 'arithmetic']