Which kind of animal is it?
The animals are ducks.
    src        edge_attr  dst
0     0   to the left of    1
1     1               on    0
2     1  to the right of    0
3     1   to the left of    7
4     2               of    1
5     3               of    1
6     4               of    1
7     5               of    1
8     6               of    1
9     6               of    5
10    7  to the right of    1
11    7  to the right of    8
12    8               of    1
13    8   to the left of    7