Are there any ladders or fences in the photo?
Yes, there is a fence.
    src         edge_attr  dst
0     1  on the bottom of    3
1     3         on top of    8
2     4           wearing    6
3     4        leaning on    7
4     4           wearing    5
5     4           wearing    9
6     4       standing on    3
7     4       in front of    7
8     4         on top of    3
9     4                on    3
10    7            behind    4