Do these animals have the same species?
No, they are bears and ducks.
    src        edge_attr  dst
0     0   to the left of    1
1     0   to the left of   13
2     0  to the right of   10
3     1  to the right of   13
4     1  to the right of   11
5     1               of   12
6     1  to the right of    0
7     2               of   12
8     3   to the left of   12
9     3   to the left of    4
10    3               in   11
11    3               in    0
12    4  to the right of    8
13    4  to the right of    5
14    4  to the right of   10
15    4  to the right of    3
16    5   to the left of    4
17    5   to the left of   12
18    5   to the left of    8
19    6  to the right of    7
20    7   to the left of    6
21    8   to the left of    4
22    8   to the left of   12
23    8  to the right of    5
24   10   to the left of    4
25   10               in   11
26   10   to the left of    0
27   11   to the left of    1
28   12               in   11
29   12               on   16
30   12  to the right of    3
31   12  to the right of    5
32   12  to the right of    8
33   13  to the right of    0
34   13   to the left of    1
35   15               on   12