Are there helmets or life vests?
Yes, there is a helmet.
    src        edge_attr  dst
0     1  to the right of   16
1     1  to the right of   14
2     1  to the right of    3
3     1  to the right of   15
4     2               on    0
5     3  to the right of   12
6     3   to the left of    1
7     3   to the left of    7
8     4  to the right of   13
9     4   to the left of    5
10    5  to the right of    9
11    5  to the right of    4
12    7  to the right of   14
13    7  to the right of   15
14    7  to the right of    3
15    7  to the right of   13
16    9        riding on   11
17    9          wearing    3
18    9          wearing   13
19    9          wearing    2
20    9   to the left of   10
21    9   to the left of    5
22    9               on   11
23    9               in    8
24    9          wearing    1
25    9          wearing   15
26    9          holding   11
27   10  to the right of    9
28   11  to the right of   14
29   11  to the right of   12
30   11  to the right of   13
31   12   to the left of   13
32   12   to the left of   14
33   12   to the left of   11
34   12   to the left of    3
35   12   to the left of   15
36   13  to the right of   16
37   13  to the right of   12
38   13   to the left of    7
39   13   to the left of   11
40   13   to the left of    4
41   14   to the left of   11
42   14   to the left of    1
43   14  to the right of   12
44   14  to the right of   16
45   14   to the left of    7
46   15   to the left of    1
47   15   to the left of    7
48   15  to the right of   12
49   16   to the left of   13
50   16   to the left of   14
51   16   to the left of    1