What is on the pole?
The sign is on the pole.
    src        edge_attr  dst
0     0               on    5
1     1   to the left of    7
2     3  to the right of    7
3     4               on    1
4     5               on    9
5     6               on    9
6     7  to the right of    1
7     7               on    9
8     7   to the left of   11
9     7   to the left of    3
10   10               on   11
11   11  to the right of    7