question: If in one image, a bookshelf has three vertical shelf sections with a computer placed in the center unit.
#1 return bookshelves 
#2 return shelf sections of  #1 
#3 return #2 that are  vertical 
#4 return number of #3 for each #1 
#5 return #1 where #4 is  equal to three 
#6 return center unit of  #5 
#7 return computer 
#8 return #5 where #7 is  placed in  #6 
#9 return if  #8 is  in  one image