The traffic sign is on what?
The traffic sign is on the signal light.
    src        edge_attr  dst
0     0               on   11
1     0  to the right of   11
2     0   to the left of    2
3     0   to the left of    1
4     0  to the right of    7
5     0   to the left of    5
6     1  to the right of    0
7     1  to the right of   11
8     1   to the left of    5
9     1               on   11
10    1  to the right of    7
11    1   to the left of    2
12    2               on   11
13    2  to the right of    0
14    2   to the left of    5
15    2  to the right of    1
16    2  to the right of    7
17    2  to the right of   11
18    4  to the right of   10
19    4               on   11
20    4   to the left of    5
21    5  to the right of    1
22    5  to the right of    2
23    5  to the right of    4
24    5  to the right of   12
25    5  to the right of    0
26    6  to the right of   12
27    7  to the right of   10
28    7   to the left of    2
29    7   to the left of    1
30    7   to the left of    0
31    7               on   11
32    9       covered by   13
33   10   to the left of   11
34   10   to the left of   12
35   10   to the left of    4
36   10   to the left of    7
37   11  to the right of   10
38   11   to the left of    0
39   11   to the left of    2
40   11   to the left of    1
41   12   to the left of    5
42   12  to the right of   10
43   12   to the left of    6
44   13         covering    9