What animal is walking in the calm water?
The horses are walking in the water.
    src        edge_attr  dst
0     0  to the right of   10
1     0  to the right of    9
2     1   to the left of    2
3     2  to the right of    9
4     2  to the right of    1
5     2  to the right of   10
6     2          wearing    3
7     3   to the left of    8
8     5  to the right of   14
9     7         lying on   12
10    8  to the right of    3
11    8  to the right of   13
12    9   to the left of    2
13    9   to the left of    0
14   10   to the left of    0
15   10   to the left of    2
16   13   to the left of    8
17   14       walking in    4
18   14               in    4
19   14   to the left of    5