Do you see a fence or a mirror in the picture?
Yes, there is a fence.
    src        edge_attr  dst
0     0  to the right of    3
1     0  to the right of    4
2     0   to the left of   10
3     0   to the left of   11
4     0   to the left of   17
..  ...              ...  ...
76   19  to the right of   17
77   19  to the right of   10
78   21  to the right of    0
79   21  to the right of    9
80   21               of   18

[81 rows x 3 columns]