How deep is the water?
The water is shallow.
   src        edge_attr  dst
0    0   to the left of    2
1    1  to the right of    5
2    2  to the right of    0
3    4     growing near    8
4    5   to the left of    1
5    5   to the left of    9
6    6        on top of    3
7    6  to the right of   12
8    9  to the right of    5
9   12   to the left of    6