Task: Question Decomposition
Input (English): question: show me all flights between san francisco and philadelphia for september fifteenth 
Output (English): #1 return flights 
#2 return #1 on september fifteenth 
#3 return #2 from  san francisco 
#4 return #3 to philadelphia 
#5 return #2 from  philadelphia 
#6 return #5 to san francisco 
#7 return #4 ,  #6