Are there both a fence and a helmet in this image?
No, there is a fence but no helmets.
    src        edge_attr  dst
0     0  to the right of   15
1     0  to the right of   12
2     0  to the right of   16
3     0  to the right of    9
4     0  to the right of   13
5     0  to the right of    2
6     1               in    6
7     2   to the left of    0
8     3               on   16
9     3   to the left of   14
10    3   to the left of    8
11    3  to the right of   10
12    3   to the left of   12
13    4               on   16
14    4  to the right of   18
15    4   to the left of    5
16    5               on   16
17    5  to the right of   18
18    5  to the right of    4
19    7  to the right of   15
20    8   to the left of   12
21    8  to the right of   10
22    8               on   16
23    8  to the right of    3
24    8  to the right of   14
25    9   to the left of   15
26    9   to the left of    0
27   10   to the left of   12
28   10   to the left of    3
29   10   to the left of   14
30   10   to the left of    8
31   10               on   16
32   11               on   16
33   12  to the right of   10
34   12               on   16
35   12  to the right of    8
36   12  to the right of   14
37   12  to the right of    3
38   12   to the left of    0
39   13   to the left of   19
40   13   to the left of    0
41   14               on   16
42   14   to the left of   12
43   14  to the right of   10
44   14   to the left of    8
45   14  to the right of    3
46   15  to the right of    9
47   15   to the left of    7
48   15   to the left of    0
49   16               on   15
50   16   to the left of    0
51   16   to the left of   19
52   17  to the right of   20
53   18   to the left of    4
54   18   to the left of    5
55   18               on   16
56   19  to the right of   16
57   19  to the right of   13
58   20   to the left of   17