What vegetable is white?
The vegetable is lettuce.
    src        edge_attr  dst
0     0               on    4
1     1            above    6
2     1               on    6
3     1             near    3
4     1            above    2
5     1             with    8
6     1          next to    3
7     1  to the right of    7
8     1  to the right of    3
9     1               on    3
10    2            under    1
11    3   to the left of    6
12    3   to the left of    1
13    3   to the left of    8
14    3             near    1
15    6            under    1
16    6  to the right of    3
17    7               on    3
18    7   to the left of    1
19    8  to the right of    3
20    8               on    1