Which kind of baked good is plain?
The baked good is a donut.
   src        edge_attr  dst
0    0  to the right of    2
1    0  to the right of    3
2    1  to the right of    5
3    2   to the left of    0
4    3               on    5
5    3   to the left of    0
6    4             with    5
7    5               on    1
8    5   to the left of    1