Task: Question Decomposition
Input (English): question: There is a large object obscured by a gray cylinder; what is the object to the left of it made of?
Output (English): #1 return large object  
#2 return gray cylinder 
#3 return #1 obscured by #2 
#4 return objects 
#5 return #4 to the  left of #3 
#6 return what  is #5 made of