Task: Question Generation
Input (English): #1 return parties 
#2 return hosts of #1 
#3 return number of  #2 for each  #1 
#4 return #1 where #3 is higher than 20 
#5 return hosts of #4 
#6 return names of #5
Output (English): Show the host names for parties with number of hosts greater than 20.