What vehicle is it?
The vehicle is a trailer.
    src        edge_attr  dst
0     0   to the left of   13
1     0   to the left of    4
2     0   to the left of    2
3     0   to the left of   12
4     2   to the left of    4
5     2  to the right of    0
6     2   to the left of   13
7     2   to the left of   12
8     4  to the right of    0
9     4   to the left of   11
10    4   to the left of   12
11    4   to the left of   13
12    4  to the right of    2
13    5  to the right of    6
14    6   to the left of    5
15    7   to the left of   11
16    7  to the right of   10
17    7  to the right of    9
18    7  to the right of    8
19    8   to the left of    7
20    8  to the right of    9
21    8   to the left of   10
22    9   to the left of   10
23    9   to the left of    8
24    9   to the left of    7
25   10  to the right of    9
26   10  to the right of    8
27   10   to the left of   11
28   10   to the left of    7
29   11  to the right of   13
30   11  to the right of    7
31   11  to the right of    4
32   11  to the right of   12
33   11  to the right of   10
34   12   to the left of   11
35   12  to the right of    0
36   12  to the right of    4
37   12  to the right of    2
38   12   to the left of   13
39   13  to the right of    0
40   13   to the left of   11
41   13  to the right of    2
42   13  to the right of    4
43   13  to the right of   12