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