What is the sign on?
The sign is on the glass.
    src        edge_attr  dst
0     0   to the left of    2
1     0  to the right of    5
2     1   to the left of   10
3     1   to the left of    9
4     1   to the left of    2
5     2  to the right of    1
6     2  to the right of    6
7     2  to the right of    0
8     2  to the right of    3
9     2  to the right of    8
10    2  to the right of   11
11    3   to the left of    2
12    3  to the right of    5
13    4  to the right of    5
14    5   to the left of    4
15    5   to the left of    7
16    5   to the left of    6
17    5   to the left of   11
18    5   to the left of    0
19    5   to the left of    3
20    5   to the left of    8
21    6   to the left of    2
22    6  to the right of    5
23    7  to the right of    5
24    8   to the left of    2
25    8  to the right of    5
26    8   to the left of   10
27    8   to the left of    9
28    9               on   10
29    9  to the right of    1
30    9  to the right of    8
31   10  to the right of    1
32   10  to the right of    8
33   11   to the left of    2
34   11  to the right of    5