What is located on top of the plate which is to the left of the placemat?
The napkin is on top of the plate.
    src        edge_attr  dst
0     0   to the left of   16
1     0   to the left of    3
2     0               in   11
3     2        on top of    5
4     2   to the left of    7
..  ...              ...  ...
64   18  to the right of    9
65   18  to the right of   19
66   18  to the right of   17
67   19   to the left of   18
68   19   to the left of    8

[69 rows x 3 columns]