What place is this?
It is an ocean.
    src        edge_attr  dst
0     0  to the right of    4
1     0   to the left of    2
2     1  to the right of    4
3     2  to the right of    0
4     2  to the right of    4
5     4   to the left of    1
6     4   to the left of    0
7     4   to the left of    2
8     4   to the left of    7
9     4   to the left of    6
10    4   to the left of    8
11    6  to the right of    4
12    7  to the right of    4
13    8  to the right of    4