What is the mirror on?
The mirror is on the pole.
    src        edge_attr  dst
0     0   to the left of    6
1     1  to the right of    4
2     2               on    9
3     2   to the left of   10
4     3               of    9
5     3  to the right of    7
6     4               on    1
7     4   to the left of    1
8     6  to the right of    0
9     6               on    9
10    6   on the side of    9
11    7  to the right of    8
12    7   to the left of    3
13    7               on    9
14    8               of    9
15    8   to the left of    7
16   10  to the right of    2
17   11               of    9