What is on the tray?
The donut is on the tray.
    src        edge_attr  dst
0     0  to the right of    5
1     1            above   10
2     1  to the right of    6
3     1  to the right of    5
4     1   to the left of    4
..  ...              ...  ...
86   17   to the left of    4
87   17  to the right of    5
88   18  to the right of    3
89   18  to the right of   13
90   18  to the right of    1

[91 rows x 3 columns]