What kind of vegetable is to the right of the lemon?
The vegetable is broccoli.
    src        edge_attr  dst
0     1  to the right of    5
1     1  to the right of    4
2     3               on    6
3     3  to the right of    7
4     4   to the left of    8
5     4   to the left of    1
6     5               on    6
7     5   to the left of    1
8     6             with    2
9     7   to the left of    3
10    7   to the left of    9
11    8               on    6
12    8  to the right of    4
13    9  to the right of    7
14    9               on    6