What is in the water?
The boats are in the water.
    src        edge_attr  dst
0     0               in    1
1     0   to the left of    1
2     0   to the left of    2
3     1  to the right of    0
4     1   to the left of    2
5     1   to the left of    8
6     2   to the left of    5
7     2  to the right of    1
8     2   to the left of    9
9     2  to the right of    0
10    3   to the left of   12
11    5  to the right of    2
12    8  to the right of    1
13    9  to the right of    2
14   12               in   13
15   12  to the right of    3