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