What is the box filled with?
The box is filled with carrots.
    src          edge_attr  dst
0     0     to the left of    7
1     1    to the right of   24
2     1     to the left of    5
3     3  sitting on top of   20
4     4     to the left of   20
..  ...                ...  ...
71   23    to the right of   21
72   23    to the right of   15
73   23    to the right of   16
74   24     to the left of    1
75   24                 in   18

[76 rows x 3 columns]