What kind of food is on the crust?
The food is cheese.
   src        edge_attr  dst
0    1               on    2
1    3   to the left of    8
2    3  to the right of    4
3    3  to the right of    5
4    4   to the left of    3
5    4               on    0
6    5   to the left of    3
7    8  to the right of    3
8    9               on    7