How many less people were in the peninsula during the first census compared to the pre-war population?
return people ;return #1 that were in  the  peninsula ;return #2 during the  first census ;return number of  #3 ;return #1 in  the  pre-war population ;return number of  #5 ;return difference of #6 and  #4
['select', 'filter', 'filter', 'aggregate', 'filter', 'aggregate', 'arithmetic']