On which side of the picture is the shelf?
The shelf is on the left of the image.
    src        edge_attr  dst
0     0  to the right of   19
1     1   to the left of   21
2     1   to the left of   22
3     1   to the left of    7
4     2  to the right of    3
..  ...              ...  ...
66   22   to the left of   13
67   22  to the right of    7
68   22   to the left of    8
69   22  to the right of    1
70   22  to the right of   17

[71 rows x 3 columns]