Which guests have apartment bookings with status code "Confirmed"? Return their first names and last names.
return guests ;return apartment bookings of #1 ;return status codes of #2 ;return #1 where #3 is  Confirmed ;return first names  of #4 ;return last names  of #4 ;return #5 ,  #6
['select', 'project', 'project', 'comparative', 'project', 'project', 'union']