What do you think is located on top of the food with the spinach?
The tomato is on top of the pizza.
    src        edge_attr  dst
0     1   to the left of    7
1     2               on    9
2     4               on    9
3     5  to the right of    8
4     6               on    9
5     7   to the left of   10
6     7        on top of    9
7     7  to the right of    1
8     8   to the left of    5
9     9             with    6
10    9             with    2
11    9             with   12
12   10  to the right of    7
13   12               on    9