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