What is the name of the vegetables that are not cooked?
The vegetables are onions.
   src        edge_attr  dst
0    0   to the left of    3
1    1   to the left of    3
2    2   to the left of    3
3    3  to the right of    2
4    3  to the right of    1
5    3  to the right of    4
6    3        on top of    5
7    3  to the right of    0
8    4   to the left of    3
9    6        on top of    5