What is located on top of the table?
The napkins are on top of the table.
    src        edge_attr  dst
0     2             near    4
1     2             near    5
2     2          wearing    0
3     2  to the right of    9
4     2  to the right of    8
5     2             with    1
6     3           inside    4
7     3               in    4
8     4             near    6
9     4               on    5
10    4          holding    3
11    4             near    2
12    4   to the left of    6
13    5             near    2
14    6               on    5
15    6             near    4
16    6        on top of    5
17    6  to the right of    4
18    6   to the left of   10
19    7  to the right of    8
20    8   to the left of    7
21    8   to the left of    2
22    9  to the right of   11
23    9               on   11
24    9   to the left of    2
25   10  to the right of    6
26   10               on    5
27   11   to the left of    9