Is the sandwich on a tray?
No, the sandwich is on the plate.
    src        edge_attr  dst
0     0   to the left of    4
1     0   to the left of    9
2     0               on    2
3     0  to the right of    7
4     0   to the left of    3
5     1               on    2
6     2   to the left of    9
7     3               in   10
8     3  to the right of    0
9     4  to the right of    0
10    7   to the left of    0
11    9  to the right of    0
12    9  to the right of   11
13    9  to the right of    2
14   10               on    2
15   11   to the left of    9