Is there either a bus or a fence in the scene?
Yes, there is a bus.
    src        edge_attr  dst
0     0   to the left of   11
1     0  to the right of   23
2     0   to the left of   22
3     0   to the left of    8
4     0   to the left of    6
..  ...              ...  ...
82   24  to the right of   14
83   24  to the right of    2
84   24   to the left of   22
85   24  to the right of   23
86   24             near   15

[87 rows x 3 columns]