Which side of the photo is the train on?
The train is on the right of the image.
    src        edge_attr  dst
0     1  to the right of    4
1     1  to the right of    8
2     1   to the left of    3
3     1   to the left of   12
4     1   to the left of   14
..  ...              ...  ...
88   18  to the right of    1
89   18   to the left of   19
90   19  to the right of   18
91   19  to the right of    3
92   19  to the right of   16

[93 rows x 3 columns]