What is located on top of the oatmeal?
The walnut is on top of the oatmeal.
    src        edge_attr  dst
0     0             near   12
1     0        on top of   11
2     0          next to   12
3     0               in    9
4     0               in   11
5     0   to the left of    7
6     0   to the left of    1
7     0   to the left of    8
8     1        on top of   11
9     1          next to   12
10    1               in    9
11    1               in   11
12    1             near   12
13    1   to the left of    8
14    1   to the left of    3
15    1  to the right of    0
16    2           inside    9
17    2               in    9
18    3             near   12
19    3        on top of   11
20    3               in   11
21    3               in    9
22    3          next to   12
23    3  to the right of    1
24    5               in    9
25    6               in    9
26    6   to the left of   10
27    7               in    9
28    7  to the right of    8
29    7  to the right of    0
30    8  to the right of    1
31    8  to the right of    0
32    8               in    9
33    8   to the left of    7
34    9        on top of    4
35    9      filled with   11
36   10               in    9
37   10  to the right of    6
38   11           inside    9
39   11               in    9
40   12             near    3
41   12             near    0
42   12           inside    9
43   12             near    1
44   12               in    9
45   13           inside    9
46   13         stuck in   11
47   13               in    9