What's the train on?
The train is on the platform.
    src        edge_attr  dst
0     0  to the right of    4
1     1  to the right of    6
2     1   to the left of    8
3     1   to the left of    3
4     2   to the left of    4
5     3  to the right of   11
6     3  to the right of    1
7     3           inside   12
8     3   to the left of    8
9     4            above   12
10    4   to the left of    0
11    4  to the right of    2
12    5               of   12
13    6   to the left of    9
14    6   to the left of    1
15    6   to the left of   11
16    7  to the right of    8
17    7  to the right of    9
18    8   to the left of    7
19    8  to the right of    1
20    8  to the right of    3
21    9  to the right of    6
22    9   to the left of    7
23   11  to the right of    6
24   11   to the left of    3
25   12               on   10
26   12            below    4