Is the train on the left or on the right?
The train is on the right of the image.
    src        edge_attr  dst
0     0   to the left of   20
1     0   to the left of   19
2     0   to the left of    2
3     0   to the left of    1
4     1  to the right of   10
..  ...              ...  ...
57   19  to the right of    0
58   19   to the left of    4
59   20  to the right of   10
60   20  to the right of    0
61   20   to the left of    4

[62 rows x 3 columns]