What kind of sign is in front of the small car?
The sign is a stop sign.
    src        edge_attr  dst
0     0   to the left of   12
1     0   to the left of    6
2     1  to the right of   12
3     1  to the right of   10
4     1   to the left of    8
5     1   to the left of    4
6     2   to the left of    6
7     2   to the left of   12
8     2      in front of    9
9     3        on top of    4
10    3            below   11
11    3               on    4
12    4  to the right of   10
13    4  to the right of    1
14    4   to the left of    8
15    5               on    2
16    5               by    9
17    5            below   11
18    5      in front of    9
19    5        on top of    2
20    6   on the side of    9
21    6               by    0
22    6   to the left of   12
23    6  to the right of    0
24    6  to the right of    2
25    7     connected to    8
26    7     connected to   10
27    7  to the right of   12
28    7  to the right of   10
29    8  to the right of    4
30    8  to the right of    1
31    9   to the left of   12
32    9           behind    5
33    9           behind    2
34    9               by    5
35   10   to the left of    1
36   10   to the left of    4
37   10   to the left of    7
38   10  to the right of   12
39   10               by    1
40   10               by   12
41   12  to the right of    6
42   12   to the left of    7
43   12   to the left of   10
44   12  to the right of    9
45   12  to the right of    0
46   12   to the left of    1
47   12  to the right of    2
48   12               by    5