On which side is the shelf?
The shelf is on the left of the image.
    src        edge_attr  dst
0     0  to the right of    5
1     0   to the left of   16
2     2   to the left of   18
3     3   to the left of   14
4     3   to the left of   13
..  ...              ...  ...
56   17  to the right of    7
57   18  to the right of   10
58   18  to the right of   14
59   18  to the right of   13
60   18  to the right of    2

[61 rows x 3 columns]