Is the train to the left or to the right of the car on the left?
The train is to the right of the car.
    src        edge_attr  dst
0     0   to the left of   12
1     2  to the right of   15
2     2  to the right of   16
3     2  to the right of   17
4     2  to the right of   11
..  ...              ...  ...
72   17   to the left of    3
73   17   to the left of   16
74   17   to the left of   14
75   17   to the left of   11
76   17   to the left of    2

[77 rows x 3 columns]