What kind of food is not purple?
The food is carrots.
     src        edge_attr  dst
0      0   to the left of   17
1      0   to the left of    5
2      0   to the left of   20
3      0   to the left of   21
4      0               on   18
..   ...              ...  ...
110   21  to the right of    8
111   21   to the left of   16
112   21   to the left of   10
113   21  to the right of    9
114   21  to the right of    0

[115 rows x 3 columns]