What vehicle is to the left of the person that is wearing a helmet?
The vehicle is a minivan.
    src        edge_attr  dst
0     0   to the left of   15
1     2   to the left of    8
2     2               of   13
3     3   to the left of    5
4     3   to the left of   15
5     3  to the right of   16
6     3   to the left of    6
7     5  to the right of   14
8     5  to the right of    3
9     5   to the left of   11
10    5  to the right of   13
11    6  to the right of   10
12    6  to the right of    3
13    6   to the left of    7
14    7  to the right of    6
15    8   to the left of    9
16    8  to the right of    2
17    8  to the right of   13
18    9  to the right of   15
19    9  to the right of   11
20    9  to the right of    8
21   10   to the left of    6
22   11  to the right of    5
23   11   to the left of    9
24   11  to the right of   15
25   13  to the right of   16
26   13   to the left of    8
27   13   to the left of    5
28   13   to the left of   15
29   14   to the left of   15
30   14  to the right of   16
31   14   to the left of    5
32   15  to the right of   13
33   15   to the left of   11
34   15          wearing    5
35   15  to the right of    3
36   15  to the right of   14
37   15   to the left of    9
38   15           riding    8
39   15  to the right of    0
40   16           beside    3
41   16   on the side of    3
42   16   to the left of   13
43   16   to the left of    3
44   16   to the left of   14