What is on the cake?
The frosting is on the cake.
    src        edge_attr  dst
0     0               on    5
1     0  to the right of    6
2     0  to the right of    3
3     2            under    5
4     2            below    5
5     3               on    5
6     3   to the left of    0
7     5               on    1
8     5               on    2
9     5            above    2
10    6               on    3
11    6   to the left of    0