Which place is it?
It is a lake.
    src        edge_attr  dst
0     1               on    0
1     1   to the left of    5
2     1               in    0
3     1   to the left of    4
4     2  to the right of    9
5     2  to the right of    4
6     3               on   10
7     4  to the right of    1
8     4   to the left of   11
9     4   to the left of    2
10    4  to the right of    5
11    5   to the left of    4
12    5  to the right of    1
13    8   to the left of    9
14    8               on    7
15    9  to the right of    8
16    9   to the left of    2
17   11  to the right of    4