What is the green food?
The food is a vegetable.
    src        edge_attr  dst
0     0   to the left of   11
1     0   to the left of    8
2     1   to the left of    9
3     1   to the left of    5
4     1   to the left of    6
5     2   to the left of   11
6     2   to the left of    8
7     3  to the right of    6
8     3   to the left of    4
9     3  to the right of   12
10    4  to the right of    3
11    4  to the right of   12
12    4  to the right of    6
13    5  to the right of    1
14    6   to the left of    3
15    6  to the right of    1
16    6   to the left of    4
17    6  to the right of    7
18    7   to the left of    6
19    8  to the right of    0
20    8  to the right of    2
21    8  to the right of   11
22    8  to the right of   12
23    9  to the right of    1
24   11  to the right of    2
25   11  to the right of    0
26   11   to the left of    8
27   12   to the left of    8
28   12   to the left of    4
29   12   to the left of    3