If some laptops are stacked in multiple rows at least four to a stack.
return laptops ;return #1 that are stacked ;return number of  #1 for each  #2 ;return #2 where  #3 is at least four ;return rows of #4 ;return number of  #5 ;return if  #6 is at least two
['select', 'filter', 'group', 'comparative', 'project', 'aggregate', 'boolean']