What are the animals to the left of the white sheet?
The animals are horses.
    src        edge_attr  dst
0     0   to the left of    4
1     0   to the left of    1
2     0   to the left of   10
3     1  to the right of   19
4     1   to the left of   12
..  ...              ...  ...
80   19   to the left of    1
81   19   to the left of    9
82   19   to the left of   10
83   20  to the right of    5
84   20  to the right of    9

[85 rows x 3 columns]