Are there any mirrors or bridges?
Yes, there is a bridge.
    src        edge_attr  dst
0     0               on    5
1     0  to the right of   11
2     1   to the left of   14
3     1   to the left of   13
4     2  to the right of    8
5     3   to the left of   11
6     4  to the right of    7
7     5  to the right of   11
8     7               on    9
9     7           behind    8
10    7   to the left of    4
11    8      in front of    7
12    8   to the left of    2
13   10           beside    9
14   11   to the left of    5
15   11   to the left of    0
16   11  to the right of    3
17   11   to the left of   12
18   12  to the right of   11
19   13  to the right of    1
20   13  to the right of   15
21   13  to the right of   16
22   14  to the right of   15
23   14  to the right of    1
24   15   to the left of   14
25   15   to the left of   13
26   16           beside    9
27   16   to the left of   13