What is on the pizza?
The toppings are on the pizza.
    src        edge_attr  dst
0     0  to the right of    7
1     0  to the right of    5
2     1               on    5
3     1            above    7
4     1            above    5
5     2               on    1
6     3   to the left of    6
7     3           beside    6
8     4          next to    5
9     4             near    5
10    5            below    1
11    5   to the left of    6
12    5   to the left of    0
13    5             near    4
14    6  to the right of    3
15    6  to the right of    5
16    7   to the left of    0
17    7            below    1
18    7               on    4
19    7               of    1