On which side is the fence?
The fence is on the left of the image.
    src        edge_attr  dst
0     0   to the left of   18
1     0   to the left of    5
2     0   to the left of    8
3     0   to the left of    6
4     2   to the left of   22
..  ...              ...  ...
65   22  to the right of    3
66   22   to the left of   20
67   22  to the right of    2
68   22   to the left of   19
69   22  to the right of   21

[70 rows x 3 columns]