Situation: I am leaning on a trash can with a table in my one o'clock direction and facing an armchair.
Alternative situations: I am standing in the bottom left corner of the room, my head is not facing the window to my left, all I am doing is jumping up and down in the same spot. I just change the trash can garbage bag behind me, walking towards the arm chair that is ahead of me across the room from where I am.
Question: How many bookshelfs are behind me?