Are there cars or trains in the photo?
Yes, there is a train.
    src        edge_attr  dst
0     0  to the right of   21
1     0  to the right of    5
2     0  to the right of    4
3     0  to the right of   13
4     0  to the right of    6
..  ...              ...  ...
79   22  to the right of   11
80   22   to the left of    7
81   23   to the left of   19
82   23   to the left of    3
83   23   to the left of   10

[84 rows x 3 columns]