Which place is it?
It is a walkway.
   src        edge_attr  dst
0    3  to the right of   10
1    8  to the right of   11
2    8   to the left of    9
3    9  to the right of   11
4    9  to the right of    8
5   10   to the left of    3
6   10   to the left of   13
7   11   to the left of    8
8   11   to the left of    9
9   13  to the right of   10