On which side of the photo is the shelf?
The shelf is on the left of the image.
    src        edge_attr  dst
0     0  to the right of   13
1     0  to the right of   12
2     0  to the right of   18
3     0  to the right of    5
4     1  to the right of    8
..  ...              ...  ...
73   19  to the right of   13
74   20   to the left of   15
75   20   to the left of    7
76   20  to the right of   11
77   20   to the left of   17

[78 rows x 3 columns]