What is on the pole?
The traffic light is on the pole.
    src        edge_attr  dst
0     0           beside    1
1     1               by    3
2     1             near    3
3     1             near    5
4     1       hanging on    0
5     1               on    0
6     1   to the left of    5
7     1   to the left of    3
8     1          next to    3
9     3          next to    1
10    3  to the right of    4
11    3  to the right of    1
12    3             near    1
13    4   to the left of    3
14    5             near    1
15    5  to the right of    1
16    5  to the right of    6
17    6   to the left of    5