Which industry across Greater Sydney is larger: Professional Services or Retail Trade?
return Greater Sydney ;return industries of #1 ;return #2 that is Professional Services ;return #2 that is Retail Trade ;return size of #3 ;return size of #4 ;return which is highest of #5 ,  #6
['select', 'project', 'filter', 'filter', 'project', 'project', 'comparison']