What kind of food is the sandwich topped with?
The sandwich is topped with toast.
    src        edge_attr  dst
0     0   to the left of   12
1     0               on   14
2     1  to the right of    8
3     1  to the right of    9
4     1  to the right of    4
5     1   to the left of    7
6     2  to the right of    4
7     2   to the left of   12
8     3               on   14
9     4   to the left of    2
10    4   to the left of    1
11    4   to the left of    8
12    5  to the right of   12
13    6  to the right of   14
14    7  to the right of    1
15    8   to the left of    1
16    8  to the right of    4
17    8  to the right of    9
18    9   to the left of    1
19    9   to the left of    8
20   10   to the left of   12
21   12  to the right of    2
22   12  to the right of   14
23   12   to the left of    5
24   12  to the right of   10
25   12  to the right of    0
26   13               on   11
27   14   to the left of   12
28   14   to the left of    6
29   14             with    3
30   14               on   13
31   14      topped with    0
32   15               on    5
33   15           beside   13