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