On which side of the image are the white papers?
The papers are on the right of the image.
    src        edge_attr  dst
0     0   to the left of   12
1     0   to the left of   13
2     0  to the right of    4
3     0  to the right of    3
4     0   to the left of    6
..  ...              ...  ...
56   15   to the left of   12
57   15  to the right of    3
58   15   to the left of    6
59   15  to the right of    4
60   15               of    0

[61 rows x 3 columns]