What vehicle is to the right of the black bus?
The vehicle is a trailer.
    src        edge_attr  dst
0     0  to the right of   12
1     0   on the side of    4
2     0  to the right of    1
3     0   to the left of    8
4     1   to the left of    4
5     1      in front of    4
6     1   to the left of    0
7     2  to the right of   10
8     2  to the right of   14
9     2  to the right of   11
10    2  to the right of    6
11    2  to the right of    8
12    2        on top of    4
13    4  to the right of    1
14    4       driving on   13
15    4           behind    1
16    5   to the left of    8
17    6   to the left of   10
18    6   to the left of    2
19    7        on top of    3
20    8  to the right of   12
21    8   to the left of    2
22    8  to the right of    0
23    8  to the right of    9
24    8  to the right of    5
25    8   on the side of    4
26    9   to the left of   11
27    9   to the left of    8
28   10  to the right of    6
29   10        on top of    4
30   10   to the left of    2
31   11   to the left of    2
32   11  to the right of    9
33   12   to the left of    0
34   12   to the left of    8
35   14   to the left of    2