Which part of the picture is the fence in, the bottom or the top?
The fence is in the top of the image.
   src        edge_attr  dst
0    0   to the left of    9
1    0   to the left of   10
2    3  to the right of    9
3    5        on top of   12
4    9   to the left of    3
5    9  to the right of    0
6   10  to the right of    0