What are the power lines on?
The wires are on the telephone pole.
    src        edge_attr  dst
0     0               on   20
1     1  to the right of    6
2     1   to the left of    4
3     3   to the left of   21
4     4  to the right of    6
5     4  to the right of    1
6     5  to the right of   12
7     5  to the right of   11
8     6   to the left of    4
9     6   to the left of    1
10    7  to the right of    9
11    7  to the right of   21
12    8               on    9
13    9   to the left of    7
14    9  to the right of   11
15    9   to the left of   15
16    9  to the right of   18
17   11   to the left of   12
18   11   to the left of    9
19   11   to the left of    5
20   12   to the left of    5
21   12  to the right of   11
22   13  to the right of   18
23   14           behind   16
24   14   to the left of   17
25   14   to the left of   20
26   15  to the right of   21
27   15  to the right of    9
28   17  to the right of   21
29   17               on   16
30   17  to the right of   19
31   17   to the left of   20
32   17  to the right of   14
33   18   to the left of    9
34   18   to the left of   21
35   18   to the left of   13
36   19   to the left of   17
37   19   to the left of   20
38   20  to the right of   17
39   20  to the right of   14
40   20  to the right of   19
41   20  to the right of   21
42   21   to the left of    7
43   21  to the right of    3
44   21   to the left of   20
45   21   to the left of   15
46   21   to the left of   17
47   21  to the right of   18