Which place is it?
It is a field.
   src        edge_attr  dst
0    0   on the back of    4
1    1   to the left of    8
2    2  to the right of    5
3    2  to the right of    4
4    4   to the left of    2
5    5   to the left of    2
6    5   to the left of    8
7    8  to the right of    5
8    8  to the right of    1