Are these animals of different species?
No, all the animals are bears.
    src        edge_attr  dst
0     0  to the right of   13
1     1   to the left of    5
2     1   to the left of    3
3     2  to the right of    3
4     3               on    5
5     3   to the left of    2
6     3  to the right of    1
7     5  to the right of    6
8     5  to the right of    1
9     6               in   12
10    6   to the left of    5
11    6   to the left of    9
12    6  to the right of    7
13    7               on   12
14    7   to the left of    6
15    8   to the left of    9
16    8   to the left of   11
17    9  to the right of    6
18    9  to the right of    8
19   11  to the right of    8
20   13   to the left of    0
21   14          holding    4
22   14         lying on   12