Which apartments have bookings with both status codes "Provisional" and "Confirmed"? Give me the apartment numbers.
return apartments ;return bookings of #1 ;return status codes of #2 ;return #1 where #3 is Provisional ;return #1 where #3 is Confirmed ;return #1 of both #4 and  #5 ;return apartment numbers of #6
['select', 'project', 'project', 'comparative', 'comparative', 'intersection', 'project']