Task: Question Generation
Input (English): #1 return hosts  
#2 return #1 that  are older than  45 
#3 return #1 that  are younger than  35 
#4 return the  nations of #2 
#5 return the  nations of #3 
#6 return the  nations in both #4 and #5
Output (English): Show the nations that have both hosts older than 45 and hosts younger than 35.