What is located on top of the box?
The pizza is on top of the box.
    src        edge_attr  dst
0     0               on    2
1     0  to the right of    4
2     1             with    2
3     1            under    2
4     1            below    2
5     2        on top of    1
6     2            above    1
7     2             with    0
8     2             with    4
9     2             with    3
10    2               in    1
11    2       sitting in    1
12    2         lying in    1
13    3               on    2
14    3        on top of    2
15    3  to the right of    4
16    4               on    2
17    4   to the left of    3
18    4   to the left of    0