What is located on top of the table in this image?
The tray is on top of the table.
   src        edge_attr  dst
0    0               on    3
1    1               on    5
2    1   to the left of    4
3    3               on    4
4    3        on top of    4
5    4             with    3
6    4  to the right of    1
7    5               on    6
8    6        on top of    2