Task: Question Generation
Input (English): #1 return students 
#2 return #1 with  allergies to food types 
#3 return #1 with  allergies to animal types 
#4 return #1 in both #2 and  #3 
#5 return how  old are #4 
#6 return average of #5
Output (English): How old are the students with allergies to food and animal types on average?