How big are the cupcakes the icing is on?
The cupcakes are small.
   src        edge_attr  dst
0    2               on    6
1    4   to the left of    8
2    8  to the right of    4
3    8             with    9
4    8             with   13
5   11               on    7
6   12               on   11
7   13               on    3