How many more billions of dollars was Sydney's manufacturing output in 2013 compared to Melbourne?
return Sydney ;return Melbourne ;return manufacturing outputs in  billions of dollars of  #1 ;return manufacturing outputs in  billions of dollars of  #2 ;return #3 in  2013 ;return #4 in  2013 ;return the  difference of #5 and  #6
['select', 'select', 'project', 'project', 'filter', 'filter', 'arithmetic']