Is that train red or blue?
The train is blue.
    src        edge_attr  dst
0     1            below   12
1     1          beneath   12
2     2               on    1
3     2            below   12
4     2          beneath   12
5     2   to the left of   13
6     4  to the right of    9
7     5               on   12
8     6               on   12
9     7               on   12
10    7   to the left of   10
11    8  to the right of   14
12    8               on    1
13    9   to the left of   11
14    9   to the left of    4
15    9        pulled by   11
16   10  to the right of    7
17   11               on   12
18   11          pulling    9
19   11  to the right of    9
20   12            above    1
21   12            above    2
22   13  to the right of   14
23   13  to the right of    2
24   14   to the left of    8
25   14   to the left of   13