Are there any fences or cans?
Yes, there is a fence.
    src        edge_attr  dst
0     4  to the right of   17
1     4  to the right of   15
2     5      in front of   10
3     5               on    0
4     5  to the right of   11
5     5  to the right of   17
6     5               on    2
7     5  to the right of   12
8     6   to the left of    9
9     6   to the left of   14
10    8   to the left of   17
11    8  to the right of   13
12    9  to the right of    6
13    9   to the left of   14
14   10           behind    5
15   11   to the left of    5
16   12   to the left of    5
17   13   to the left of    8
18   14  to the right of    9
19   14  to the right of    6
20   15   to the left of    4
21   17   to the left of    4
22   17   to the left of    5
23   17  to the right of    8