Is the fence on the left of the image?
No, the fence is on the right of the image.
   src        edge_attr  dst
0    0   to the left of    2
1    0   to the left of    5
2    0   to the left of    3
3    2  to the right of    0
4    3               of    2
5    3  to the right of    0
6    5  to the right of    0