What vehicle is on the train tracks?
The vehicle is a train.
    src        edge_attr  dst
0     0             near    7
1     0  to the right of   11
2     0  to the right of    8
3     0   to the left of    2
4     0  to the right of    1
..  ...              ...  ...
71   14               by    1
72   14               by    0
73   14   to the left of    2
74   14               by   11
75   14   to the left of    5

[76 rows x 3 columns]