Task: Question Decomposition
Input (English): question: what is the first class fare for a round trip dallas to denver 
Output (English): #1 return flights 
#2 return #1 from  dallas 
#3 return #2 to denver 
#4 return #3 that  is  round trip 
#5 return #4 that  is  on  first class 
#6 return fares of #5