What is the vehicle on the street?
The vehicle is a truck.
    src        edge_attr  dst
0     0   to the left of   13
1     1  to the right of   16
2     1  to the right of    8
3     3   to the left of   16
4     3  to the right of    7
5     3  to the right of   13
6     4   to the left of   17
7     5  to the right of    9
8     6  to the right of   13
9     6  to the right of    8
10    6   to the left of   16
11    7  to the right of   13
12    7   to the left of   16
13    7   to the left of    3
14    8   to the left of    1
15    8   to the left of   16
16    8   to the left of    6
17    9   to the left of   15
18    9   to the left of    5
19   10  to the right of   13
20   10   to the left of   16
21   12   to the left of   16
22   12   to the left of   18
23   13               on    9
24   13   to the left of    3
25   13  to the right of    0
26   13   to the left of    6
27   13   to the left of    7
28   13               on    2
29   13   to the left of   10
30   15  to the right of    9
31   16  to the right of   10
32   16  to the right of    8
33   16   to the left of    1
34   16  to the right of    6
35   16  to the right of    3
36   16  to the right of    7
37   16  to the right of   12
38   17  to the right of    4
39   17               by    9
40   18  to the right of   12