Where in the picture is the shelf, on the right or on the left?
The shelf is on the left of the image.
    src        edge_attr  dst
0     0               on    1
1     0   to the left of   17
2     1   to the left of   16
3     1   to the left of   18
4     1   to the left of   17
..  ...              ...  ...
63   20  to the right of   15
64   22   to the left of    7
65   22  to the right of    1
66   22   to the left of   13
67   22   to the left of    8

[68 rows x 3 columns]