What sign is it?
The sign is a stop sign.
    src        edge_attr  dst
0     0   to the left of    5
1     0   to the left of   10
2     1   to the left of    2
3     1   to the left of    6
4     1  to the right of    8
5     1  to the right of    7
6     2  to the right of    7
7     2   to the left of    6
8     2  to the right of    1
9     2  to the right of    8
10    2  to the right of    9
11    4   to the left of    6
12    5  to the right of    0
13    5  to the right of   11
14    6  to the right of    1
15    6  to the right of    9
16    6  to the right of    4
17    6  to the right of    2
18    7  to the right of    8
19    7   to the left of    1
20    7   to the left of    2
21    8   to the left of    7
22    8   to the left of    1
23    8   to the left of    2
24    9   to the left of    2
25    9   to the left of    6
26   10  to the right of    0
27   11   to the left of    5