What's in the box?
The rice is in the box.
    src        edge_attr  dst
0     0   to the left of   12
1     0   to the left of   11
2     0  to the right of   20
3     0   to the left of   14
4     1   to the left of    4
..  ...              ...  ...
58   20   to the left of   14
59   20               in   15
60   20   to the left of   17
61   20   to the left of   12
62   20   to the left of    0

[63 rows x 3 columns]