What is the item of furniture that the box is on?
The piece of furniture is a shelf.
    src        edge_attr  dst
0     0   to the left of    1
1     0   to the left of    3
2     1   to the left of    2
3     1  to the right of    0
4     1               on    0
5     1   to the left of    3
6     2  to the right of    4
7     2  to the right of    5
8     2   to the left of    7
9     2  to the right of    1
10    3  to the right of    1
11    3  to the right of    5
12    3  to the right of    4
13    3  to the right of    8
14    3  to the right of    0
15    4   to the left of    2
16    4   to the left of    3
17    5               on    4
18    5   to the left of    7
19    5   to the left of    3
20    5   to the left of    2
21    5               on    8
22    7  to the right of    8
23    7  to the right of    5
24    7  to the right of    2
25    8   to the left of    3
26    8   to the left of    7