on flight us air 2153 from san francisco to baltimore what time and what city does the plane stop in between 
return flight us air 2153 ;return #1 from  san francisco ;return #2 to baltimore ;return the time the  plane stops in between on  #3 ;return the city in which  the  plane stops in  between on  #3 ;return #4 , #5
['select', 'filter', 'filter', 'project', 'project', 'union']