Are there any skis or cake slices?
Yes, there are skis.
    src        edge_attr  dst
0     0   to the left of    4
1     0   to the left of   17
2     0   to the left of   19
3     0   to the left of    5
4     0   to the left of   18
..  ...              ...  ...
64   19  to the right of   12
65   19  to the right of    0
66   19  to the right of   17
67   19  to the right of    5
68   19   to the left of    2

[69 rows x 3 columns]