How is the water in this scene?
The water is calm.
    src        edge_attr  dst
0     0  to the right of    6
1     1   to the left of    6
2     2   to the left of    6
3     3               by    7
4     4   to the left of    6
5     5   to the left of    6
6     6  to the right of    2
7     6  to the right of    4
8     6               by    7
9     6  to the right of    5
10    6   to the left of    0
11    6  to the right of    1