Where is the fence?
The fence is on the yard.
   src        edge_attr  dst
0    1  to the right of    4
1    2  to the right of    4
2    2  to the right of    5
3    4   to the left of    1
4    4               on    0
5    4   to the left of    2
6    5   to the left of    2
7    7               of    3