What is the vehicle in front of the buildings that are in front of the school bus?
The vehicle is a car.
    src        edge_attr  dst
0     0   to the left of    3
1     1  to the right of   15
2     1   to the left of   11
3     1  to the right of   13
4     1  to the right of    5
5     2               on    4
6     2               in    0
7     2   to the left of    3
8     3               on    4
9     3           behind   14
10    3  to the right of   15
11    3  to the right of   12
12    3  to the right of    0
13    3  to the right of   14
14    3  to the right of    6
15    3  to the right of    4
16    3  to the right of    8
17    3  to the right of    5
18    3  to the right of    7
19    3  to the right of    9
20    3  to the right of    2
21    4             near   12
22    4   to the left of    3
23    5   to the left of    1
24    5   to the left of    3
25    6   to the left of    3
26    6      in front of   14
27    7   to the left of    8
28    7   to the left of    3
29    8  to the right of    7
30    8   to the left of    3
31    9   to the left of    3
32   10               on    4
33   11  to the right of    1
34   12   to the left of    3
35   12             near    4
36   13   to the left of    1
37   14   to the left of    3
38   14           behind    6
39   14      in front of    3
40   15               in    5
41   15   to the left of    3
42   15   to the left of    1