Find the number of different departments in each school whose number of different departments is less than 5.
return schools ;return different departments  of #1 ;return number of  #2 for each #1 ;return #1 where #3 is  less than  5 ;return different departments  of #4 ;return number of  #5 for each #4
['select', 'project', 'group', 'comparative', 'project', 'group']