Task: Question Generation
Input (English): #1 return objects 
#2 return #1 that  are a sphere 
#3 return materials of #2 
#4 return number of  #2 for each #3 
#5 return #3 where #4 is  one 
#6 return #2 where #3 is  #5
Output (English): what sphere is a different material than the others?