Are there either trains or fences in the image?
Yes, there is a train.
    src        edge_attr  dst
0     0  to the right of    1
1     1   to the left of   18
2     1   to the left of    9
3     1   to the left of    3
4     1   to the left of    0
5     2  to the right of    4
6     2  to the right of    8
7     3  to the right of    1
8     4   to the left of    2
9     6   to the left of   21
10    6   to the left of   14
11    7   to the left of   19
12    7   to the left of   17
13    7   to the left of   12
14    8   to the left of    2
15    9  to the right of    1
16   10   to the left of   14
17   10   to the left of   21
18   12  to the right of    7
19   13   to the left of   14
20   13   to the left of   21
21   14  to the right of   10
22   14  to the right of   13
23   14  to the right of   21
24   14  to the right of   20
25   14  to the right of    6
26   15   to the left of   17
27   17  to the right of    7
28   17  to the right of   22
29   17  to the right of   15
30   18  to the right of    1
31   19  to the right of    7
32   20   to the left of   21
33   20   to the left of   14
34   21  to the right of   10
35   21  to the right of    6
36   21  to the right of   13
37   21   to the left of   14
38   21  to the right of   20
39   22   to the left of   17