Does the fence have a different color than the sky?
Yes, the sky is blue and the fence is white.
    src        edge_attr  dst
0     0   to the left of    7
1     0   to the left of    4
2     0  to the right of   11
3     0  to the right of    9
4     1  to the right of    9
..  ...              ...  ...
64   19   to the left of   17
65   20   to the left of    7
66   20   to the left of    4
67   21   to the left of    7
68   21   to the left of    4

[69 rows x 3 columns]