Where does the white zebra drink from?
The zebra drinks from the river.
    src        edge_attr  dst
0     0    drinking from   15
1     0      standing in   15
2     0  to the right of   16
3     0  to the right of    8
4     0  to the right of   21
..  ...              ...  ...
68   21  to the right of    3
69   21  to the right of    1
70   21  to the right of   10
71   21   to the left of    9
72   21      standing in   15

[73 rows x 3 columns]