Is there any fence or elephant in the scene?
Yes, there is an elephant.
    src        edge_attr  dst
0     0  to the right of   22
1     0  to the right of    4
2     0  to the right of   20
3     0  to the right of   11
4     1               in    0
..  ...              ...  ...
77   21  to the right of    5
78   21             near    3
79   21               in    0
80   22   to the left of   20
81   22   to the left of    0

[82 rows x 3 columns]