Which side of the picture is the shelf on?
The shelf is on the left of the image.
    src        edge_attr  dst
0     0   to the left of    7
1     0   to the left of    9
2     1  to the right of   16
3     2   to the left of    9
4     3  to the right of   12
5     6   to the left of   14
6     6   to the left of    9
7     6   to the left of   10
8     6               on    4
9     7  to the right of    0
10    8   to the left of   13
11    8   to the left of   12
12    8   to the left of   14
13    9  to the right of   16
14    9  to the right of   12
15    9  to the right of   10
16    9  to the right of    6
17    9  to the right of   14
18    9  to the right of   13
19    9  to the right of    0
20    9  to the right of    2
21   10  to the right of    6
22   10   to the left of    9
23   10  to the right of   12
24   11  to the right of   16
25   12   to the left of   10
26   12   to the left of    9
27   12   to the left of    3
28   12  to the right of    8
29   13   to the left of    9
30   13  to the right of    8
31   14   to the left of    9
32   14  to the right of    8
33   14  to the right of    6
34   16          holding    7
35   16   to the left of    1
36   16   to the left of   11
37   16   to the left of    9