What is the depth of the water?
The water is deep.
    src        edge_attr  dst
0     0  to the right of    2
1     0               in    7
2     0            below    8
3     2   to the left of    0
4     2   to the left of    4
5     2   to the left of    3
6     3  to the right of    2
7     3  to the right of    5
8     3   to the left of    4
9     4  to the right of    5
10    4  to the right of    3
11    4               on    0
12    4  to the right of    8
13    4  to the right of    2
14    5   to the left of    3
15    5   to the left of    4
16    6               of    8
17    7            below    8
18    8               on    0
19    8          wearing    2
20    8   to the left of    4