How many million fewer poor persons were there in Thailand in 2015 compared to 2014?
return Thailand ;return poor persons in  #1 ;return #2 in  2015 ;return #2 in  2014 ;return number of  #3 ;return number of  #4 ;return difference of #6 and  #5 ;return division of #7 and  one million
['select', 'project', 'filter', 'filter', 'aggregate', 'aggregate', 'arithmetic', 'project']