Task: Question Generation
Input (English): #1 return matches 
#2 return losers of  #1 
#3 return winners of  #1 
#4 return ages of  #2 
#5 return ages of  #3 
#6 return average of  #4 
#7 return average of  #5 
#8 return #6 ,  #7
Output (English): What are the average ages of losers and winners across matches?