Which color is the stop sign, white or black?
The stop sign is white.
    src        edge_attr  dst
0     0  to the right of    5
1     0  to the right of    9
2     1  to the right of   12
3     1   to the left of    6
4     1  to the right of    5
5     2   on the side of   15
6     2   to the left of    3
7     3  to the right of    2
8     4               at    3
9     5   to the left of    0
10    5   to the left of    1
11    5   to the left of    7
12    6  to the right of    1
13    7  to the right of    5
14    7  to the right of    9
15    8   on the side of    0
16    8               on    0
17    9   to the left of   10
18    9   to the left of    7
19    9   to the left of    0
20   10   on the side of    0
21   10  to the right of    9
22   10           beside   15
23   11               on    1
24   12  to the right of   14
25   12   to the left of    1
26   12               on    5
27   14   to the left of   12
28   14   to the left of   16
29   16  to the right of   14