What is the vehicle on the road?
The vehicle is a van.
    src        edge_attr  dst
0     2  to the right of   11
1     2  to the right of   14
2     3               on    9
3     4  to the right of    9
4     4               on    7
5     5  to the right of   11
6     5  to the right of   14
7     9   to the left of    4
8     9   to the left of   12
9     9   to the left of   11
10   11   to the left of    2
11   11   to the left of    5
12   11  to the right of    9
13   11   to the left of   14
14   12               on    7
15   12  to the right of    9
16   12               in   13
17   14   to the left of    5
18   14   to the left of    2
19   14  to the right of   11