What is on the tray?
The meat is on the tray.
    src        edge_attr  dst
0     0               on    1
1     0               on   12
2     0  to the right of    2
3     0  to the right of    3
4     2               on    1
..  ...              ...  ...
58   19  to the right of   13
59   20  to the right of   10
60   20   to the left of   14
61   20  to the right of    8
62   20  to the right of    9

[63 rows x 3 columns]