What is on the bun?
The seeds are on the bun.
    src        edge_attr  dst
0     1   to the left of    6
1     1   to the left of    9
2     1   to the left of    5
3     1   to the left of    4
4     1               on    0
5     1   to the left of    8
6     1   to the left of   10
7     1   to the left of    3
8     3  to the right of    1
9     4  to the right of    1
10    5  to the right of    1
11    6               on    4
12    6  to the right of    1
13    7               in   11
14    8  to the right of    1
15    9  to the right of    1
16   10  to the right of    1
17   10               in    9
18   10               on    5