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