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