Is there either any purple salad or lettuce?
Yes, there is purple lettuce.
    src        edge_attr  dst
0     0  to the right of    2
1     1   to the left of    7
2     1               of    6
3     2   to the left of    0
4     3  to the right of    4
5     4   to the left of    7
6     4   to the left of    3
7     4   to the left of    6
8     6  to the right of    4
9     7  to the right of    4
10    7  to the right of    1