Return the booking start date and end date for the apartments that have type code "Duplex".
return apartments ;return type codes of  #1 ;return #1 where #2 is  Duplex ;return booking start date  of  #3 ;return booking end date  of  #3 ;return #4 ,  #5
['select', 'project', 'comparative', 'project', 'project', 'union']