What are the animals in the field?
The animals are horses.
    src        edge_attr  dst
0     0               in    4
1     0       running on   12
2     0   to the left of    9
3     0               on   12
4     0   to the left of   11
5     0  to the right of   10
6     1   to the left of    8
7     2  to the right of   11
8     4   to the left of   12
9     6          leading    0
10    6               on    2
11    6   to the left of   13
12    6  to the right of   11
13    7   to the left of   13
14    7  to the right of   11
15    8  to the right of    1
16    8  to the right of    9
17    8  to the right of   11
18    9   to the left of   13
19    9  to the right of    0
20    9   to the left of    8
21    9  to the right of   11
22   10   to the left of    0
23   11   to the left of    6
24   11   to the left of    2
25   11  to the right of    0
26   11   to the left of   13
27   11   to the left of    9
28   11   to the left of    8
29   11   to the left of    7
30   12               on    3
31   12  to the right of    4
32   13  to the right of    9
33   13  to the right of   11
34   13  to the right of    6
35   13  to the right of    7