Who is wearing the helmet?
The officer is wearing a helmet.
    src        edge_attr  dst
0     0          wearing   16
1     0          wearing    4
2     0           riding    6
3     0   to the left of    3
4     0  to the right of   13
5     0  to the right of   12
6     0  to the right of    2
7     0  to the right of    8
8     0          wearing   15
9     2   to the left of    0
10    2       sitting on    1
11    2   to the left of    8
12    3  to the right of    0
13    3  to the right of   16
14    4   to the left of    5
15    5  to the right of    4
16    5   on the side of    6
17    8   to the left of    0
18    8  to the right of    2
19    9           behind   11
20    9  to the right of   14
21   10  to the right of   12
22   11           beside    1
23   11      in front of    9
24   12   on the back of    6
25   12   to the left of    0
26   12   to the left of   10
27   13   to the left of    0
28   14   to the left of    9
29   16   to the left of    3