What is located on top of the brown table?
The tray is on top of the table.
    src        edge_attr  dst
0     0   to the left of    8
1     0   to the left of    9
2     1  to the right of   20
3     1        on top of   15
4     1   to the left of   22
..  ...              ...  ...
87   25  to the right of   15
88   25        on top of   24
89   25   to the left of   11
90   25   to the left of    5
91   25  to the right of   10

[92 rows x 3 columns]