On which side of the picture is the fence?
The fence is on the right of the image.
    src        edge_attr  dst
0     0   to the left of   21
1     1   to the left of    5
2     1   to the left of   12
3     2   to the left of   17
4     3  to the right of    6
..  ...              ...  ...
70   21  to the right of    9
71   21  to the right of    0
72   21  to the right of   10
73   21  to the right of   17
74   21  to the right of   19

[75 rows x 3 columns]