Is the tomato on broccoli?
No, the tomato is on the lettuce.
    src        edge_attr  dst
0     0               on    6
1     0             near    4
2     0   to the left of    2
3     1               on    5
4     1               on    6
5     1  to the right of    2
6     2             with    3
7     2   to the left of    1
8     2               on    6
9     2             with    5
10    2  to the right of    0
11    3               on    2
12    3   to the left of    5
13    4             near    0
14    4             near    6
15    5               on    2
16    5  to the right of    3
17    5               on    6
18    6             near    4