Task: Question Generation
Input (English): #1 return the  big  gray thing 
#2 return the  big  cylinder 
#3 return objects 
#4 return shapes of #3 
#5 return shape of #1 
#6 return #3 where  #4 is the  same as #5 
#7 return #6 that are  behind #2 
#8 return the  color of #7
Output (English): What color is the object that has the same shape as the big gray thing and is behind the big cylinder?