is there a flight leaving at 1505 from pittsburgh to baltimore on july twenty fifth 1991 
return flights ;return #1 from  pittsburgh ;return #2 to baltimore ;return #3 on  july twenty fifth 1991 ;return #4 leaving at 1505 ;return is  there  a #5
['select', 'filter', 'filter', 'filter', 'filter', 'boolean']