Which place is it?
It is a beach.
   src        edge_attr  dst
0    1               of   10
1    1  to the right of    9
2    2  to the right of   10
3    2  to the right of    9
4    6               of   10
5    7               of   10
6    9               of   10
7    9   to the left of    2
8    9   to the left of    1
9   10   to the left of    2