from las vegas to new york a nonstop twa and fare 
return flights ;return #1 that  are nonstop ;return #2 that  are twa ;return #3 from  las vegas ;return #4 to new york ;return fares of #5 ;return #5 , #6
['select', 'filter', 'filter', 'filter', 'filter', 'project', 'union']