Is the shelf on the left?
Yes, the shelf is on the left of the image.
    src        edge_attr  dst
0     0  to the right of    4
1     0  to the right of   14
2     0   to the left of    6
3     0  to the right of   15
4     0  to the right of    5
..  ...              ...  ...
71   15   to the left of    1
72   15   to the left of    0
73   15   to the left of   11
74   15   to the left of    8
75   15   to the left of   12

[76 rows x 3 columns]