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