i want information on flights from atlanta to washington dc i want to leave wednesday after 4pm or thursday before 9am 
return flights ;return #1 from  atlanta ;return #2 to washington dc ;return #3 on  wednesday ;return #4 that  leave after 4pm ;return #3 on  thursday ;return #6 that  leave before 9am ;return information on  #5 ;return information on  #7 ;return #8 , #9
['select', 'filter', 'filter', 'filter', 'filter', 'filter', 'filter', 'project', 'project', 'union']