eastern flight 825 from atlanta to denver leaving at 555 what type of aircraft is used on that flight 
return flights ;return #1 on eastern 825 ;return #2 from atlanta ;return #3 to  denver ;return #4 leaving at 555 ;return aircraft of #5 ;return type of #6
['select', 'filter', 'filter', 'filter', 'filter', 'project', 'project']