Which place is it?
It is an ocean.
    src        edge_attr  dst
0     1  to the right of    7
1     1  to the right of   10
2     2   to the left of   12
3     2   to the left of    9
4     2   to the left of   11
5     2   to the left of    8
6     4   to the left of   12
7     4   to the left of    9
8     4   to the left of    8
9     4   to the left of   11
10    5               in    6
11    7               in    6
12    7  to the right of   10
13    7   to the left of    1
14    8  to the right of    4
15    8  to the right of    2
16    9  to the right of    2
17    9  to the right of    4
18   10   to the left of    7
19   10   to the left of    1
20   11  to the right of    4
21   11  to the right of    2
22   12  to the right of    2
23   12  to the right of    4