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