On which side of the image is the fence?
The fence is on the left of the image.
     src        edge_attr  dst
0      0               of    9
1      0   to the left of   10
2      0   to the left of   21
3      0   to the left of   22
4      0   to the left of    7
..   ...              ...  ...
115   22  to the right of    0
116   22  to the right of   21
117   22   to the left of   19
118   23               of    9
119   23   to the left of    5

[120 rows x 3 columns]