Situation: I am facing a chair, while having a whiteboard on the right and another chair with a backpack on top of it behind me.
Alternative situations: I just dropped my bookbag off on the round table behind me and am going to sit and do my homework on the chair right in front of the cabinet. I placed my backpack on the chair behind me and walked towards the chair in front of me.
Question: What is on top of the chair behind me?