Are the animals of different species?
No, all the animals are zebras.
    src        edge_attr  dst
0     0               of    4
1     2   to the left of   12
2     2      standing on    8
3     2   to the left of    4
4     2   to the left of    9
5     2   to the left of    7
6     3      standing on    8
7     3    standing near    2
8     3  to the right of    6
9     3   to the left of    4
10    3    standing near    4
11    4      standing on    8
12    4  to the right of    3
13    4  to the right of    2
14    4  to the right of   12
15    5  to the right of   11
16    6   to the left of    3
17    7               of    3
18    7  to the right of    2
19    9               of    3
20    9  to the right of    2
21    9  to the right of   13
22   10  to the right of   11
23   10   to the left of   13
24   11   to the left of    5
25   11   to the left of   10
26   11   to the left of   13
27   12               of    3
28   12  to the right of    2
29   12   to the left of    4
30   13   to the left of    9
31   13  to the right of   10
32   13  to the right of   11