What are the booking start and end dates of the apartments with type code "Duplex"?
return apartments ;return type codes of  #1 ;return #1 where #2 is  Duplex ;return booking start dates of  #3 ;return booking end dates of  #3 ;return #4 ,  #5
['select', 'project', 'comparative', 'project', 'project', 'union']