Are all the animals of the same species?
No, there are both birds and cows.
    src        edge_attr  dst
0     0               of   12
1     0  to the right of   10
2     0   to the left of   11
3     0   to the left of   16
4     2               in    1
..  ...              ...  ...
63   16   to the left of   11
64   17  to the right of    6
65   17   to the left of   12
66   19               of    7
67   19  to the right of    6

[68 rows x 3 columns]