What is on the sandwich?
The sign is on the sandwich.
    src        edge_attr  dst
0     1   to the left of    9
1     1   to the left of   13
2     2  to the right of    5
3     2  to the right of   16
4     3               on   13
5     3  to the right of   14
6     5   to the left of    6
7     5   to the left of   13
8     5   to the left of    2
9     6  to the right of   16
10    6  to the right of    5
11    9  to the right of   16
12    9  to the right of   14
13    9  to the right of    1
14   11   to the left of   13
15   13  to the right of   15
16   13  to the right of   16
17   13  to the right of    5
18   13  to the right of   11
19   13  to the right of    1
20   14   to the left of    3
21   14   to the left of    9
22   15   to the left of   13
23   16   to the left of    2
24   16   to the left of    9
25   16   to the left of    6
26   16   to the left of   13
27   16          wearing   10
28   16          wearing    5