Do you see either fences or cars in the picture?
No, there are no cars or fences.
   src        edge_attr  dst
0    1               on    0
1    2   to the left of    6
2    2   to the left of    5
3    5  to the right of    2
4    5  to the right of    7
5    6  to the right of    7
6    6  to the right of    2
7    7   to the left of    6
8    7   to the left of    5