i would like the flight number and the time for the cheapest fare that is the least expensive first class fare from san francisco to pittsburgh leaving after 8pm monday night 
return flights ;return #1 from  san francisco ;return #2 to pittsburgh ;return #3 that  are leaving on monday ;return #4 after 8pm ;return first class fares of #5 ;return the  lowest of #6 ;return #5 where #6 is equal to #7 ;return flight number of #8 ;return flight time of #8 ;return #9 ,  #10
['select', 'filter', 'filter', 'filter', 'filter', 'project', 'aggregate', 'comparative', 'aggregate', 'project', 'union']