What is located on top of the pizza?
The mushroom is on top of the pizza.
    src        edge_attr  dst
0     0        on top of    7
1     1        on top of    7
2     1  to the right of    6
3     1  to the right of    8
4     2  to the right of   10
5     2  to the right of   15
6     2   to the left of   17
7     3  to the right of   12
8     3   to the left of    4
9     3   to the left of   14
10    3  to the right of   11
11    4   to the left of   14
12    4  to the right of   11
13    4  to the right of   12
14    4  to the right of    3
15    5   to the left of    6
16    5   to the left of   19
17    6        on top of    7
18    6   to the left of    1
19    6   to the left of   19
20    6  to the right of    5
21    7               on    8
22    7             with   17
23    7             with   15
24    7             with    0
25    7             with    1
26    7             with   19
27    7             with    6
28    7             with   13
29    8   to the left of   19
30    8   to the left of    1
31    9  to the right of   15
32    9   to the left of   17
33    9   to the left of   14
34   10   to the left of    2
35   10   to the left of   17
36   11   to the left of    4
37   11   to the left of    3
38   12   to the left of    3
39   12   to the left of    4
40   13               on    7
41   14  to the right of    3
42   14  to the right of    4
43   14  to the right of    9
44   15        on top of    7
45   15   to the left of    9
46   15   to the left of   17
47   15   to the left of    2
48   17  to the right of   10
49   17        on top of    7
50   17  to the right of    2
51   17  to the right of   15
52   17  to the right of    9
53   19  to the right of    5
54   19               on    7
55   19  to the right of    8
56   19  to the right of    6