What is hanging above the train?
The wires are hanging above the train.
    src        edge_attr  dst
0     1   to the left of   14
1     1   to the left of   11
2     1   to the left of   18
3     2  to the right of    3
4     2  to the right of   15
..  ...              ...  ...
80   21  to the right of    8
81   21  to the right of   18
82   21  to the right of   13
83   22   to the left of   10
84   22   to the left of    7

[85 rows x 3 columns]