What vehicle is to the left of the train?
The vehicle is a van.
    src        edge_attr  dst
0     0   to the left of   13
1     0  to the right of    5
2     2   to the left of    8
3     2   to the left of    3
4     3             near    8
..  ...              ...  ...
77   18   to the left of    5
78   18   to the left of    3
79   18   to the left of   14
80   18  to the right of    6
81   18   to the left of   10

[82 rows x 3 columns]