What is the vehicle that is on the bridge?
The vehicle is a car.
    src        edge_attr  dst
0     0  to the right of    6
1     0  to the right of    3
2     1  to the right of    6
3     2  to the right of    5
4     2  to the right of    6
5     3               on    5
6     3   to the left of    0
7     3  to the right of   13
8     3               on   16
9     4   to the left of    6
10    5   to the left of    2
11    6   to the left of    1
12    6   to the left of    0
13    6   to the left of    2
14    6  to the right of    9
15    6  to the right of   14
16    6  to the right of    4
17    6               on   17
18    7   to the left of    9
19    7   to the left of   14
20    7   to the left of   11
21    8  to the right of   15
22    9  to the right of    7
23    9   to the left of    6
24    9   to the left of   14
25   10  to the right of   18
26   10   to the left of   11
27   11  to the right of   18
28   11  to the right of   10
29   11  to the right of    7
30   12            below    3
31   13   to the left of    3
32   14  to the right of    7
33   14   to the left of    6
34   14  to the right of    9
35   15   to the left of    8
36   15   to the left of   16
37   16  to the right of   15
38   18   to the left of   10
39   18   to the left of   11