Are the animals of different species?
Yes, they are horses and dogs.
    src        edge_attr  dst
0     0             near    3
1     0  to the right of    6
2     0  to the right of    2
3     1           behind    3
4     1             near    3
5     1           behind    6
6     1  to the right of    7
7     2             near    3
8     2   to the left of    4
9     2   to the left of    3
10    2   to the left of    6
11    2   to the left of    5
12    2   to the left of    0
13    3             near    4
14    3             near    1
15    3             near    0
16    3      in front of    1
17    3             near    6
18    3             near    2
19    3  to the right of    5
20    3  to the right of    2
21    4  to the right of    2
22    4             near    3
23    5  to the right of    2
24    5               of    0
25    5   to the left of    3
26    6               on    5
27    6      in front of    1
28    6               on    2
29    6             near    3
30    6   to the left of    0
31    6           riding    2
32    6  to the right of    2
33    6          wearing    7
34    7   to the left of    1