What place is this?
It is a runway.
   src        edge_attr  dst
0    3  to the right of   11
1    5   to the left of    8
2    8               on    1
3    8  to the right of    5
4   10  to the right of   11
5   11   to the left of    3
6   11   to the left of   12
7   11   to the left of   10
8   12  to the right of   11