Is the red train to the left of the train car?
No, the train is to the right of the train car.
    src        edge_attr  dst
0     0   to the left of   12
1     0   to the left of   17
2     1  to the right of   18
3     1   to the left of   15
4     1   to the left of    3
..  ...              ...  ...
56   17   to the left of    3
57   18   to the left of    3
58   18   to the left of   15
59   18   to the left of    1
60   18   to the left of    9

[61 rows x 3 columns]