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