Task: Question Generation
Input (English): #1 return the   objects 
#2 return the   gray cylinder 
#3 return the   round sphere 
#4 return #2 ,  #3 
#5 return #1 to  the   left of #4 
#6 return the   material of #5
Output (English): What material is the object that is to the left of the gray cylinder and to the left of the round sphere?