What kind of vehicle is in the field?
The vehicle is a truck.
    src        edge_attr  dst
0     0   to the left of   12
1     0   to the left of   15
2     0   to the left of   16
3     0   to the left of   18
4     0   to the left of    7
5     0   to the left of    2
6     1   to the left of    7
7     2  to the right of    0
8     2   to the left of   10
9     2  to the right of    7
10    3   to the left of    7
11    3          between    2
12    3   to the left of   15
13    4   to the left of    8
14    7  to the right of    0
15    7   to the left of   15
16    7   to the left of   18
17    7  to the right of    1
18    7  to the right of    3
19    7   to the left of    2
20    7   to the left of   12
21    7  to the right of    9
22    8   to the left of   13
23    8  to the right of    4
24    9   to the left of   11
25    9   to the left of    7
26   10  to the right of   18
27   10  to the right of   15
28   10  to the right of   12
29   10  to the right of    2
30   11               in    5
31   11        parked on   14
32   11  to the right of    9
33   12  to the right of    0
34   12  to the right of    7
35   12   to the left of   10
36   13               in   11
37   13  to the right of    8
38   13  to the right of   16
39   15   to the left of   10
40   15  to the right of    3
41   15  to the right of    0
42   15  to the right of    7
43   16   to the left of   13
44   16  to the right of    0
45   18  to the right of    0
46   18   to the left of   10
47   18  to the right of    7
48   19               of   10