What place is this?
It is an ocean.
    src        edge_attr  dst
0     1  to the right of   10
1     2   to the left of    7
2     6  to the right of   10
3     6  to the right of    9
4     6  to the right of   12
5     6  to the right of   15
6     7  to the right of    2
7     7  to the right of   11
8     7  to the right of    8
9     7               on    8
10    7               on   13
11    8   to the left of   14
12    8   to the left of   13
13    8   to the left of    7
14    9  to the right of   10
15    9   to the left of    6
16    9               on    1
17   10   to the left of    6
18   10   to the left of    1
19   10   to the left of   12
20   10   to the left of    9
21   11               on   13
22   11   to the left of    7
23   11   to the left of   13
24   12   to the left of    6
25   12               on    8
26   12  to the right of   10
27   13  to the right of   11
28   13  to the right of    8
29   14  to the right of    8
30   15   to the left of    6