What kind of vehicle is on the street?
The vehicle is a truck.
    src       edge_attr  dst
0     1  to the left of    9
1     1  to the left of    3
2     1  to the left of    8
3     1  to the left of   11
4     1  to the left of   16
..  ...             ...  ...
63   18  to the left of   16
64   18  to the left of   13
65   18  to the left of    8
66   18  to the left of    4
67   18  to the left of   15

[68 rows x 3 columns]