Which place is it?
It is a river.
    src        edge_attr  dst
0     1   to the left of   10
1     3  to the right of   12
2     3  to the right of    9
3     4               in    0
4     5               in    0
5     5   to the left of    9
6     5   to the left of   12
7     8  to the right of   12
8     8               in    0
9     8  to the right of   10
10    8  to the right of    9
11    9   to the left of    3
12    9  to the right of    5
13    9   to the left of    8
14    9               in    0
15    9         touching   13
16   10  to the right of    1
17   10   to the left of    8
18   12   to the left of    3
19   12   to the left of    8
20   12  to the right of    5
21   12  to the right of   13
22   13   to the left of   12