How many more slaves were there than whites on St. John in 1733?
return St. John ;return slaves of #1 ;return #2 in  1733 ;return whites of #1 ;return #2 in  1733 ;return number of  #3 ;return number of  #5 ;return difference of #6 and  #7
['select', 'project', 'filter', 'project', 'filter', 'aggregate', 'aggregate', 'arithmetic']