What vehicle is on the road?
The vehicle is a truck.
    src        edge_attr  dst
0     0           beside    5
1     0   to the left of    2
2     0   to the left of    8
3     1   to the left of   11
4     2   to the left of    8
5     2               on    5
6     2   to the left of   10
7     2  to the right of    0
8     3  to the right of    5
9     5   to the left of    3
10    6   to the left of   10
11    6               in    7
12    7   to the left of   12
13    8  to the right of    0
14    8  to the right of    2
15    8   to the left of   10
16    8               on    9
17    9   to the left of   10
18   10               on    5
19   10  to the right of    9
20   10  to the right of    8
21   10  to the right of    6
22   10  to the right of    2
23   10   to the left of   12
24   10   to the left of   11
25   11  to the right of    1
26   11  to the right of   10
27   12  to the right of   10
28   12  to the right of    7