Do you see any blue fences?
Yes, there is a blue fence.
    src        edge_attr  dst
0     0  to the right of    5
1     0   to the left of    4
2     0  to the right of    8
3     1  to the right of   18
4     1  to the right of    3
..  ...              ...  ...
76   18  to the right of   11
77   18  to the right of    8
78   18   to the left of    1
79   20   to the left of    4
80   20  to the right of    9

[81 rows x 3 columns]