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