What is the lamp on?
The lamp is on the pole.
    src        edge_attr  dst
0     0   to the left of    6
1     0  to the right of    3
2     0      in front of    5
3     0  to the right of    1
4     1               on    0
5     1   to the left of    0
6     2               in    4
7     2   to the left of    5
8     3   to the left of    0
9     5           behind    0
10    5  to the right of    2
11    5               on    0
12    5             near    6
13    6          next to    5
14    6               on    0
15    6  to the right of    0