What are the booking start and end dates of the apartments with more than 2 bedrooms?
return apartments ;return bedrooms of  #1 ;return number of  #2 for each  #1 ;return #1 where #3 is  higher than 2 ;return booking start dates of  #4 ;return booking end dates of  #4 ;return #5 ,  #6
['select', 'project', 'group', 'comparative', 'project', 'project', 'union']