What vegetable is to the right of the mushroom?
The vegetable is lettuce.
    src        edge_attr  dst
0     0               in    4
1     0   to the left of    1
2     1               in    4
3     1  to the right of    0
4     2               in    4
5     3   to the left of   12
6     4               in    4
7     5               in    4
8     5   to the left of   12
9     6               in    4
10    6  to the right of   11
11    7               in    4
12   11   to the left of    6
13   12  to the right of    5
14   12  to the right of    3