What's on the pole?
The chain is on the pole.
    src        edge_attr  dst
0     0           beside    4
1     0  to the right of    8
2     1   to the left of   17
3     1  to the right of   13
4     4   to the left of   16
5     4      in front of    6
6     5   to the left of    8
7     5   to the left of   15
8     6  to the right of   15
9     6           behind    4
10    7  to the right of    8
11    7   to the left of   16
12    8  to the right of    5
13    8   to the left of    7
14    8   to the left of   16
15    8   to the left of    0
16    9  to the right of   13
17   10               on    9
18   10  to the right of   13
19   11  to the right of   14
20   13   to the left of    9
21   13   to the left of   10
22   13   to the left of    1
23   14   to the left of   11
24   15  to the right of    5
25   15   to the left of    6
26   16  to the right of    8
27   16  to the right of    7
28   16  to the right of    4
29   17               in   18
30   17  to the right of    1