Are the animals of different types?
No, all the animals are elephants.
     src        edge_attr  dst
0      0          holding   19
1      0               in    1
2      0    drinking from   19
3      0  to the right of   17
4      0  to the right of   13
..   ...              ...  ...
169   28   to the left of   26
170   28   to the left of    0
171   28   to the left of   20
172   28   to the left of   18
173   28   to the left of   25

[174 rows x 3 columns]