How many members did the party lose 1933 to 1939?
return the  party ;return members of #1 ;return #2 in  1933 ;return #2 in  1939 ;return number of  #3 ;return number of  #4 ;return difference of #6 and  #5
['select', 'project', 'filter', 'filter', 'aggregate', 'aggregate', 'arithmetic']