Is this a blue train?
Yes, this is a blue train.
    src        edge_attr  dst
0     0   to the left of    3
1     0   to the left of    1
2     1      waiting for    2
3     1               on    3
4     1   to the left of    2
5     1  to the right of    0
6     2  to the right of    9
7     2  to the right of    4
8     2  to the right of   13
9     2  to the right of   10
10    2  to the right of    3
11    2  to the right of    1
12    3   to the left of    2
13    3  to the right of    0
14    4   to the left of    2
15    5   to the left of    7
16    5  to the right of   10
17    5               in    6
18    5  to the right of   11
19    5               on    2
20    6  to the right of   10
21    6   to the left of    8
22    6   to the left of    7
23    6  to the right of   11
24    7  to the right of   12
25    7  to the right of    6
26    7  to the right of    5
27    8  to the right of    6
28    8  to the right of   12
29    9   to the left of    2
30   10           behind   13
31   10   to the left of    2
32   10   to the left of    6
33   10   to the left of    5
34   10   to the left of   11
35   11               in    2
36   11   to the left of    6
37   11   to the left of    5
38   11  to the right of   13
39   11  to the right of   10
40   11               on    2
41   12   to the left of    8
42   12   to the left of    7
43   13      in front of   10
44   13   to the left of    2
45   13   to the left of   11