What is the elephant that is gray eating?
The elephant is eating branches.
    src        edge_attr  dst
0     0  to the right of    5
1     0  to the right of    3
2     1  to the right of    3
3     1  to the right of    9
4     1  to the right of    7
..  ...              ...  ...
76   16   to the left of   10
77   16   to the left of   11
78   16  to the right of   13
79   16  to the right of   12
80   16               of    3

[81 rows x 3 columns]