Show all cities without a branch having more than 100 memberships.
return cities ;return branches of #1 ;return memberships of #2 ;return number of  #3 for each #2 ;return #2 where #4 is  more than  100 ;return number of  #5 for each #1 ;return #1 where #6 is  zero
['select', 'project', 'project', 'group', 'comparative', 'group', 'comparative']