Task: Question Decomposition
Input (English): question: list all flights arriving in pittsburgh monday evening from san francisco that first class 
Output (English): #1 return flights 
#2 return #1 from san francisco 
#3 return #2 to  pittsburgh 
#4 return #3 arriving monday 
#5 return #4 arriving in the  evening 
#6 return #5 in first class