Are there both fences and skateboards in the scene?
Yes, there are both a skateboard and a fence.
    src        edge_attr  dst
0     0          wearing    9
1     0         carrying   12
2     0          holding   12
3     0           behind   11
4     0          wearing   10
5     0          wearing    8
6     0   to the left of   14
7     0   to the left of    7
8     4   to the left of   14
9     4   to the left of    7
10    7  to the right of    4
11    7  to the right of    0
12   10   to the left of   14
13   11      in front of    0
14   14  to the right of    4
15   14  to the right of   10
16   14  to the right of    0