Are there either any green lemons or peppers?
Yes, there are green lemons.
    src        edge_attr  dst
0     4  to the right of    8
1     4  to the right of    7
2     4  to the right of   11
3     7   to the left of   11
4     7   to the left of    4
5     8   to the left of   11
6     8   to the left of    4
7     8   to the left of   12
8    11  to the right of    7
9    11   to the left of    4
10   11  to the right of    8
11   12  to the right of    8