Which kind of animal is floating in the water?
The animals are birds.
    src        edge_attr  dst
0     0  to the right of    5
1     0  to the right of    4
2     1  to the right of   15
3     2               in   19
4     3  to the right of   15
5     4  to the right of    6
6     4               on    7
7     4   to the left of    0
8     4  to the right of    5
9     5               on    7
10    5   to the left of    4
11    5   to the left of    0
12    5  to the right of    6
13    6               on    7
14    6   to the left of    4
15    6  to the right of    9
16    6   to the left of    5
17    8   to the left of   18
18    9               at   17
19    9   to the left of   10
20    9   to the left of    6
21   10  to the right of    9
22   14               on   13
23   15   to the left of    1
24   15   to the left of    3
25   15  to the right of   16
26   15      floating in   19
27   16   to the left of   18
28   16   to the left of   15
29   16               in   19
30   18  to the right of   16
31   18      flying over   19
32   18  to the right of    8
33   20   to the left of   21
34   21  to the right of   20