What is the cake on?
The cake is on the tray.
    src        edge_attr  dst
0     1  to the right of    8
1     2  to the right of    8
2     2               on    4
3     3               on    0
4     3           behind    6
5     3      in front of    7
6     4               on    1
7     4               on    3
8     4  to the right of    8
9     5               on    3
10    5   to the left of    6
11    6               by    3
12    6      in front of    3
13    6               on    0
14    6               on    3
15    6  to the right of    9
16    6  to the right of    5
17    7           behind    3
18    8               on    3
19    8   to the left of    1
20    8   to the left of    2
21    8   to the left of    4
22    8        on top of    3
23    9               on    3
24    9   to the left of    6
25    9   to the left of   11
26   10               on    3
27   11  to the right of    9