What kind of vehicle is under the bridge?
The vehicles are cars.
    src        edge_attr  dst
0     0   to the left of    1
1     0  to the right of   12
2     0  to the right of    4
3     0  to the right of    3
4     0  to the right of    9
5     1  to the right of    2
6     1  to the right of   11
7     1  to the right of    5
8     1  to the right of    0
9     2  to the right of    4
10    2  to the right of    3
11    2  to the right of    9
12    2   to the left of    1
13    3   to the left of    5
14    3   to the left of    2
15    3   to the left of    0
16    3  to the right of    6
17    3   to the left of    8
18    4             near    5
19    4   to the left of    0
20    4   to the left of    2
21    4   to the left of    8
22    5   to the left of    8
23    5             near    6
24    5             near    4
25    5             near   11
26    5   to the left of    1
27    5            below    8
28    5  to the right of    6
29    5  to the right of    3
30    5            under    8
31    6             near    5
32    6   to the left of    9
33    6   to the left of    5
34    6             near   11
35    6   to the left of    3
36    7               in   11
37    8  to the right of   12
38    8  to the right of    9
39    8  to the right of    5
40    8            above    5
41    8  to the right of    3
42    8  to the right of    4
43    9   to the left of    2
44    9  to the right of    6
45    9   to the left of    0
46    9   to the left of    8
47   11             near    6
48   11   to the left of    1
49   11             near    5
50   12   to the left of    8
51   12   to the left of    0