Where is the train?
The train is on the railroad.
    src        edge_attr  dst
0     0   to the left of    5
1     0   to the left of    8
2     1  to the right of    5
3     1  to the right of   15
4     1  to the right of    7
5     1  to the right of   12
6     1  to the right of    2
7     2   to the left of    6
8     2   to the left of    1
9     3   to the left of    5
10    3  to the right of   13
11    3   to the left of    4
12    3  to the right of   10
13    3   to the left of    8
14    4  to the right of   16
15    4  to the right of    3
16    4   to the left of   12
17    5               by   12
18    5   to the left of    1
19    5  to the right of    0
20    5   to the left of    6
21    5  to the right of    3
22    6  to the right of   15
23    6  to the right of    7
24    6  to the right of    5
25    6  to the right of   12
26    6  to the right of    2
27    7  to the right of    9
28    7               on    2
29    7   to the left of    6
30    7   to the left of    1
31    8  to the right of    0
32    8   to the left of   12
33    8  to the right of    3
34    8  to the right of   16
35    9   to the left of   15
36    9   to the left of    7
37   10   to the left of    3
38   11   to the left of   14
39   12   to the left of    6
40   12   to the left of    1
41   12               on   15
42   12               on    9
43   12  to the right of    8
44   12  to the right of   16
45   12  to the right of    4
46   13   to the left of    3
47   14  to the right of   11
48   14   to the left of   15
49   15  to the right of   14
50   15   to the left of    6
51   15   to the left of    1
52   15  to the right of    9
53   16   to the left of    4
54   16   to the left of   12
55   16   to the left of    8
56   16         crossing    9
57   16           facing    2