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