What are the pipes on?
The pipes are on the telephone pole.
    src        edge_attr  dst
0     0   to the left of    6
1     0   to the left of    4
2     1  to the right of    6
3     1  to the right of    4
4     2  to the right of    6
5     2  to the right of    4
6     3   to the left of    4
7     3   to the left of    6
8     4   to the left of    2
9     4  to the right of    3
10    4               on    6
11    4  to the right of    0
12    4   to the left of    1
13    6  to the right of    3
14    6  to the right of    0
15    6   to the left of    1
16    6   to the left of    2